Clifford A. Lowe, Spota LLC, Fka Insite Solutions, LLC v. Shieldmark, Inc., Crown Equipment Corporation, Advanced Plastics, Inc.

N OTE: This disposition is nonprecedential.
United States Court of Appeals
for the Federal Circuit
______________________
CLIFFORD A. LOWE, SPOTA LLC, FKA INSITE
SOLUTIONS, LLC,
Plaintiffs-Appellants
v.
SHIELDMARK, INC., CROWN EQUIPMENT
CORPORATION, ADVANCED PLASTICS, INC.,
Defendants-Cross-Appellants
______________________
2023-1786, 2023-1871, 2023-1893
______________________
Appeals from the United States District Court for the
Northern District of Ohio in No. 1:19-cv-00748-JG, Judge
James S. Gwin.
______________________
Decided: March 24, 2025
______________________
RAY L. WEBER , Renner, Kenner, Greive, Bobak, Taylor
& Weber, Akron, OH, argued for plaintiffs-appellants. Also
represented by L AURA J. G ENTILCORE .
D AVID J. SHEIKH , Lee Sheikh & Haan LLC, Chicago, IL,
argued for defendants-cross-appellants. Also represented
by J AMES F. MCCARTHY , III, HOWARD W ERNOW , Sand,
Sebolt & Wernow Co., LPA, Canton, OH.
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LOWE v. SHIELDMARK, INC. 2
______________________
Before L OURIE, BRYSON, and REYNA, Circuit Judges.
BRYSON, Circuit Judge.
This patent case is before us following remand proceed-
ings in the district court. The parties have raised numer-
ous issues on appeal. We affirm the district court’s decision
on the issues of patent invalidity and false advertising un-
der the Lanham Act, and on most of the procedural issues
raised by the parties. We vacate and remand on one of the
issues bearing on the sanctions imposed against the plain-
tiffs.
I
Clifford A. Lowe is the inventor on U.S. Patent No.
10,214,664 (“the ’664 patent”), which is directed to floor
marking tape of the sort used in industrial facilities. Inde-
pendent claim 1 of the ’664 patent recites:
1. A floor marking tape adhered to a floor wherein
the floor marking tape establishes a boundary on
the floor; the combination comprising:
. . .
The upper surface of each lateral edge portion com-
prising an extension of the upper surface of the
body;
The lower surface of each lateral edge portion being
a flat coplanar extension of the lower surface of the
body;
The entire body of each lateral edge portion being
tapered with the upper surface of the first lateral
edge portion extending to the lower surface of the
first lateral edge portion and the upper surface of
the second lateral edge portion extending to the
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LOWE v. SHIELDMARK, INC. 3
lower surface of the second lateral edge por-
tion . . . .
’664 patent, col. 5, ll. 2–32.
Independent claim 11 recites:
11. A floor marking tape adhered to a floor wherein
the floor marking tape establishes a boundary on
the floor; the combination comprising:
. . .
The entire body of each lateral edge portion being
tapered with the upper surface of the first lateral
edge portion extending to the lower surface of the
first lateral edge portion to meet at a first junction
and the upper surface of the second lateral edge
portion extending to the lower surface of the second
lateral edge portion to meet at a second junction;
The first and second junctions disposed on the up-
permost surface of the floor such that the floor
marking tape limits unintentional lifting of the
floor marking tape from the floor . . . .
Id. at col. 6, ll. 1–32.
Briefly summarized, the complex procedural history of
this case is as follows:
In 2019, Lowe and Spota LLC filed a patent infringe-
ment action against the three defendants, which are in-
volved in manufacturing, distributing, and selling floor
marking tape under the trade name “Mighty Line.” Dkt.
No. 1 (Original Complaint). The plaintiffs alleged that
Lowe was the owner of the ’664 patent and that Spota
(which at that time was known as InSite Solutions LLC, a
North Carolina limited liability company) was the exclu-
sive licensee of the patent. Spota later added a claim
against ShieldMark, one of the defendants, for false adver-
tising in violation of the Lanham Act. The defendants
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LOWE v. SHIELDMARK, INC. 4
counterclaimed, alleging that the ’664 patent was invalid
and was unenforceable due to inequitable conduct.
Based on its claim construction rulings, the district
court granted the defendants’ motion for summary judg-
ment of non-infringement. On appeal, we vacated the dis-
trict court’s claim construction order and remanded the
case for further proceedings. Lowe v. ShieldMark, Inc., No.
2021-2164, 2022 WL 636100 (Fed. Cir. March 4, 2022).
On remand, the district court entered several signifi-
cant orders. First, in light of intervening events, the court
held that neither Lowe nor Spota had standing to sue on
the patent. In the alternative, the court held that the as-
serted claims of the ’664 patent were anticipated by a prior
art reference, U.S. Patent No. 6,120,395 (“Dorenbusch”).
The court also granted the defendants’ motion for summary
judgment on the plaintiffs’ false advertising claim under
the Lanham Act.
The court awarded attorney’s fees and costs to the de-
fendants under 35 U.S.C. § 285 as well as its inherent
power to sanction. The court, however, declined to award
fees based on inequitable conduct. The plaintiffs have ap-
pealed from the court’ dismissal order, and the defendants
have appealed from the court’s order denying fees for ineq-
uitable conduct.
II
A
The defendants’ standing argument is based on two
transactions executed while this case was pending before
this court on the plaintiffs’ first appeal.
On December 9, 2021, Lowe and Spota executed an
agreement referred to as the Patent Rights Assignment, in
which Lowe transferred to Spota his “entire right, title and
interest” in the ’664 patent, including “any cause(s) of
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LOWE v. SHIELDMARK, INC. 5
action and damages accruing prior to this assignment.”
App. 1803.
A week later, on December 16, 2021, Spota and InSite
Solutions, LLC, a Delaware limited liability company
(“InSite DE”) executed a Patent License Agreement
(“PLA”). Under the PLA, Spota granted InSite DE a non-
exclusive license to practice the ’664 patent, as well as the
right to sublicense the patent. App. 1809. In addition,
Spota granted InSite DE an exclusive option to acquire the
’664 patent and agreed not to transfer any ownership right
in the patent or any claims of infringement of the patent to
any third party. App. 1810.
Section 2.3 of the PLA provided that “Lowe as owner,
and [Spota] as exclusive licensee, of the Licensed Patents
prior to [December 16, 2021], retain the exclusive rights to
elect to maintain, control, and settle the ShieldMark Liti-
gation,” and that “Lowe and [Spota] shall bear all costs as-
sociated therewith and enjoy any recovery therefrom.” Id.
The clause further provided that “Lowe and [Spota] also
retain the exclusive rights to enforce the Licensed Patents
for recovery of damages for infringement prior to [Decem-
ber 16, 2021].” Id.
B
To establish standing under Article III of the Constitu-
tion, a plaintiff must have “(1) suffered an injury in fact, (2)
that is fairly traceable to the challenged conduct of the de-
fendant, and (3) that is likely to be redressed by a favorable
judicial decision.” Spokeo, Inc. v. Robins, 578 U.S. 330, 338
(2016).
It is undisputed that Lowe and Spota had Article III
standing when they first filed their claim of patent in-
fringement. The question is whether they lost standing to
pursue that claim in December 2021 when Lowe assigned
his patent rights to Spota and Spota granted a non-exclu-
sive license to InSite DE with the right to sublicense.
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LOWE v. SHIELDMARK, INC. 6
“[T]he touchstone of constitutional standing in a patent
infringement suit is whether a party can establish that it
has an exclusionary right in a patent that, if violated by
another, would cause the party holding the exclusionary
right to suffer legal injury.” WiAV Sols. LLC v. Motorola,
Inc., 631 F.3d 1257, 1265 (Fed. Cir. 2010). “A patent owner
has exclusionary rights as a baseline matter unless it has
transferred all exclusionary rights away.” Intell. Tech LLC
v. Zebra Techs. Corp., 101 F.4th 807, 816 (Fed. Cir. 2024).
A “shared ability to license” does not divest the patent
owner of all exclusionary rights. Id.
The Article III standing inquiry is distinct from analyz-
ing whether a plaintiff is a “patentee” under 35 U.S.C.
§ 281 that is entitled to sue for infringement. See id. at
814. The term “patentee,” as defined in 35 U.S.C. § 100(d),
includes not only the patentee to whom the patent was is-
sued but also the successors in title to the patentee. It does
not include mere licensees. Lone Star Silicon Innovations
LLC v. Nanya Tech. Corp., 925 F.3d 1225, 1229 (Fed. Cir.
2019). “[W]hether a party possesses all substantial rights
in a patent does not implicate [Article III] standing or sub-
ject-matter jurisdiction.” Id. at 1235–36.
Because Article III standing is a threshold jurisdic-
tional issue, we first address whether Spota has retained
an exclusionary right. It is undisputed that Spota cur-
rently owns the ’664 patent and that InSite DE is a non-
exclusive licensee. See Blue Br. at 21; Red Br. at 19, 28.
Spota did not give InSite DE an “express or implied prom-
ise that others shall be excluded from practicing the inven-
tion,” meaning that Spota remains free to license other
parties. Rite-Hite Corp. v. Kelley Co., Inc., 56 F.3d 1538,
1552 (Fed. Cir. 1995) (en banc). Contrary to the defend-
ants’ argument, Spota’s right to license has not been ren-
dered illusory by its agreement not to “assign or transfer to
any third party any ownership right or interest” in the ’664
patent. See App. 1810. A nonexclusive license is not an
ownership right, but merely “a promise by the licensor not
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LOWE v. SHIELDMARK, INC. 7
to sue the licensee.” Jim Arnold Corp. v. Hydrotech Sys.,
Inc., 109 F.3d 1567, 1577 (Fed. Cir. 1997); see also Ulead
Sys., Inc. v. Lex Comput. & Mgmt. Corp., 351 F.3d 1139,
1147 (Fed. Cir. 2003) (“It is well settled that a non-exclu-
sive licensee of a patent has only a personal and not a prop-
erty interest in the patent.”).
Spota has an exclusionary right sufficient to establish
Article III standing even if InSite DE has an unrestricted
right to sublicense. See Intell. Tech, 101 F.4th at 816 (“IT
still suffers an injury in fact from infringement even if IT
and Main Street can both license the patent.”). As stated
in Judge Lourie’s additional views in Uniloc USA, Inc. v.
Motorola Mobility LLC, 52 F.4th 1340, 1351 (Fed. Cir.
2022), the fact that a “licensee could preempt . . . a suit by
granting a sublicense . . . is a far cry from holding that the
patent owner, simply by having granted a non-exclusive li-
cense with the right to sublicense, loses the power to sue
an unlicensed infringer.”
In addition to having Article III standing, Spota, as the
assignee of the ’664 patent, may sue in its own name. As
an initial matter, we reject the defendants’ argument that
neither Spota nor InSite DE has all substantial rights in
the ’664 patent and that those rights “are in a state of sus-
pension.” Red Br. at 28. Under the facts of this case, if
Spota did not transfer all substantial rights to InSite DE,
then Spota has necessarily retained those rights. Patent
rights do not exist in the ether.
That Spota did not transfer all substantial rights to
InSite DE is evident from the fact that InSite DE received
only a non-exclusive license. “[A] nonexclusive licensee suf-
fers no legal injury from infringement.” Sicom Sys. Ltd. v.
Agilent Techs., Inc., 427 F.3d 971, 976 (Fed. Cir. 2005). The
PLA makes clear that InSite DE does not have the right to
sue for any infringement that occurred prior to December
16, 2021, and that its right to sue for any infringement oc-
curring after that date is conditioned on its exercise of the
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LOWE v. SHIELDMARK, INC. 8
option to acquire the ’664 patent. See App. 1809–10. Be-
cause InSite DE has not yet exercised that option, the fact
that it may one day acquire the right to sue is irrelevant
for purposes of assessing whether it has all substantial
rights as of the present. See Intell. Tech, 101 F.4th at 817
(“[I]t is clear that assignment must be evaluated based on
the actual transfer of rights, not mere ability” to obtain
those rights).
The defendants nevertheless argue that Spota lacks all
substantial rights, contending that Spota has only a “hunt-
ing license” that “does not equate to a right to enforce.”
Red Br. at 20. The defendants further argue that any right
to enforce the patent is rendered illusory by InSite DE’s
right to sublicense, citing Speedplay, Inc. v. Bebop, Inc.,
211 F.3d 1245, 1251 (Fed. Cir. 2000) and Lone Star, 925
F.3d at 1231. Id.1
The defendants’ arguments are not persuasive. First,
Spota does not have a mere “hunting license,” i.e., a con-
tractual arrangement that grants only the right to sue for
infringement without any proprietary interest in the
1 Citing the Asset Purchase Agreement, the defend-
ants argue that Lowe and Spota no longer have the right to
practice the ’664 patent. Red Br. at 21. Specifically, the
defendants assert that Lowe, on behalf of himself and
Spota, “agreed that he and his company would not manu-
facture or sell floor markers or floor tape.” Id. The defend-
ants, however, made no argument related to the Asset
Purchase Agreement before the district court. See App.
1786–1801. In any event, the Asset Purchase Agreement
simply defines Lowe (not Spota) as a “Restricted Party” and
provides that Lowe will not engage or participate in a com-
peting business for a limited number of years. See App.
2811–12. A prohibition against practicing the patent in the
future does not deprive a party of its right to sue on the
patent.
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LOWE v. SHIELDMARK, INC. 9
patent. See Prima Tek II, L.L.C. v. A-Roo Co., 222 F.3d
1372, 1381 (Fed. Cir. 2000); Ortho Pharm. Corp. v. Genetics
Inst., Inc., 52 F.3d 1026, 1034 (Fed. Cir. 1995). To the con-
trary, Spota has the “entire right, title and interest” in the
’664 patent through the Assignment on December 9, 2021,
as acknowledged by the PLA. See App. 1811 (Spota’s rep-
resentation that “it is the owner of all right, title and inter-
est in and to the Licensed Patents and has all legal rights
necessary to grant the licenses provided for in this Agree-
ment”). Second, neither Speedplay nor Lone Star suggests
that Spota lacks the right to sue because of InSite DE’s
right to sublicense.
In Speedplay, we concluded that all substantial rights
had been transferred to an exclusive licensee, which had
received the right to enforce the asserted patent as well as
the right to sublicense. See 211 F.3d at 1250–51. The li-
censors, however, had retained the right to enforce the pa-
tent if the exclusive licensee did not. Id. at 1251.
Regarding the licensors’ right to sue, we held that the right
was “illusory, because [the exclusive licensee] can render
that right nugatory by granting the alleged infringer a roy-
alty-free sublicense.” Id. That may also be true of Spota’s
right to enforce, given InSite DE’s unrestricted right to
sublicense. However, unlike the licensee in Speedplay,
InSite DE has only a non-exclusive license and lacks any
right to enforce the ’664 patent. Speedplay therefore does
not support finding that Spota has transferred all substan-
tial rights to InSite DE.
In Lone Star, the agreement at issue purported to
transfer “all right, title and interest” in the asserted pa-
tents while imposing several limits on the transferee. 925
F.3d at 1227. The transferee received the right to sue en-
tities specifically listed in the agreement, but the trans-
feror retained the right to sublicense the patents to
unlisted entities, among other rights. Id. at 1228. In con-
cluding that the transferor retained the right to sue under
the patents, we noted that the transferee’s enforcement
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LOWE v. SHIELDMARK, INC. 10
rights were “illusory, at least in part” because of the trans-
feror’s right to sublicense. Id. at 1231. However, the trans-
feror in Lone Star had rights in addition to the right to
sublicense that ensured that it “will always control how the
patents are asserted.” Id. at 1233. InSite DE lacks any
such rights.
Accordingly, Spota has Article III standing and re-
mains the “patentee,” entitled to sue for infringement.
C
“Generally, one seeking money damages for patent in-
fringement must have held legal title to the patent at the
time of the infringement.” Rite-Hite Corp., 56 F.3d at 1551;
see also Moore v. Marsh, 74 U.S. 515, 522 (1868) (“[A] sub-
sequent assignee or grantee can neither maintain an action
in his own name, or be joined with the patentee in main-
taining it for any infringement of the exclusive right com-
mitted before he became interested in the patent.”). But
“[a] party may sue for past infringement transpiring before
it acquired legal title if a written assignment expressly
grants the party a right to do so.” Abraxis Bioscience, Inc.
v. Navinta LLC, 625 F.3d 1359, 1367 (Fed. Cir. 2010).
Because Lowe owned the ’664 patent until December 9,
2021, any infringement of the patent before that date
harmed Lowe as the patent owner. See Crown Die & Tool
Co. v. Nye Tool & Mach. Works, 261 U.S. 24, 41 (1923)
(“[T]he injury inflicted by an act of infringement falls upon
the individual who owns the monopoly at the date of the
infringement.”). On December 9, 2021, however, Lowe ex-
pressly conveyed to Spota his “entire right, title and inter-
est” in the ’664 patent, including “any cause(s) of action and
damages accruing prior to this assignment.” App. 1803.
That express and unambiguous transfer of the right to sue
for infringement prior to December 9, 2021, has deprived
Lowe of Article III standing in this case.
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LOWE v. SHIELDMARK, INC. 11
Before the district court, the plaintiffs sought to over-
come the clear implication of the Assignment by arguing
that “[w]ith Lowe’s assignment of ownership of the ‘664 pa-
tent to [Spota], [Spota] granted Lowe the exclusive right to
continue to assert infringement against alleged infringers
of the ‘664 patent during his ownership of the ‘664 patent,
expressly including against ShieldMark.” App. 2703. Ac-
cording to the plaintiffs, “[t]he grant of the exclusive right
to sue ShieldMark for patent infringement did not have to
be in writing because the law does not require licenses to
be in writing—only assignments.” Id. Although the dis-
trict court agreed that the license agreement did not have
to be in writing, the court found that “Lowe has not pre-
sented adequate evidence that an exclusive license agree-
ment exists.” App. 11.
There is no clear error in that finding of jurisdictional
fact. See Abraxis Bioscience, 625 F.3d at 1363 (“To the ex-
tent any jurisdictional facts are in dispute . . . the findings
of fact are reviewed for clear error.” (cleaned up)). The rec-
ord contains no evidence of when the alleged oral agree-
ment took place; there is only attorney argument on appeal
that it was “subsequent[]” to the Assignment on December
9, 2021. Blue Br. at 29. Moreover, the only evidence that
the plaintiffs point to for both the existence and the sub-
stance of the oral agreement is the PLA. In particular, the
plaintiffs rely on Section 2.3 of the PLA, which recites that
InSite DE “acknowledges and agrees that Lowe as owner,
and [Spota] as exclusive licensee, of the Licensed Patents
prior to the Effective Date,2 retain the exclusive rights to
elect to maintain, control, and settle the ShieldMark
2 Section 2.3 does not accurately reflect the dates of
the transfer of rights. The Effective Date of the PLA is De-
cember 16, 2021. The Assignment, however, was executed
on December 9, 2021, so that Lowe was no longer the owner
past that date.
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LOWE v. SHIELDMARK, INC. 12
Litigation.” App. 1810. That statement, however, makes
no reference to an oral licensing agreement. If anything,
its reference to Lowe as simply the prior “owner” of the pa-
tent cuts against the existence of an oral licensing agree-
ment that has changed his status to an exclusive licensee.
Because the district court did not clearly err by finding
inadequate evidence of an oral licensing agreement, we
need not address whether any agreement that returned
Lowe’s right to sue for infringement prior to December 9,
2021, would have constituted a mere “hunting license.”
Lowe lost standing on December 9, 2021, when he trans-
ferred his “entire right, title and interest” in the ’664 pa-
tent, including the right to sue for past infringement
during the time he owned the patent.
III
Because we hold that Spota has Article III standing
and qualifies as a “patentee” that may sue in its own name,
we turn to the district court’s alternative ruling that the
’664 patent is anticipated by the Dorenbusch patent.
Claim 1 of Dorenbusch recites:
1. A rearrangeable marking system for temporarily
marking a defined area on a hard floor or ground
surface without interfering with use of the surface,
said rearrangeable marking system comprising a
set of individual spot markers with each said indi-
vidual spot marker made of a synthetic polymeric
material, each said individual spot marker further
having (i) a substantially flat low profile with a
thickness of from about 100 mils to about 300 mils,
(ii) peripheral edges beveled downwardly at an
about 30 degree to about 60 degree angle to the hor-
izontal, (iii) a non-slip bottom surface for resisting
lateral forces, and (iv) a textured top surface,
whereby each said individual spot marker when
placed on the surface resists lateral forces to
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LOWE v. SHIELDMARK, INC. 13
remain in place yet is readily lifted from the surface
for movement to another area or to storage.
App. 66, col. 4 ll. 2–16.
The plaintiffs’ argument to the district court that
Dorenbusch does not disclose every limitation of the ’664
patent was based solely on two limitations. See App. 1042–
43 (the plaintiffs’ initial briefing on anticipation), App.
1676–77 (the plaintiffs’ post-remand briefing, which is
identical to the initial brief). First, the plaintiffs argued
that Dorenbusch does not disclose that “the upper surface
of each lateral edge portion [comprises] an extension of the
upper surface of the body,” as claimed in independent claim
1 (the “extension of the upper surface” limitation). App.
1676. Second, the plaintiffs argued that Dorenbusch does
not disclose that the tape “limits unintentional lifting of the
floor marking tape from the floor,” as claimed in independ-
ent claim 11 (the “limits unintentional lifting” limitation).
App. 1677. The plaintiffs made no argument about the “se-
curing” limitation found in claims 1 and 11 or any limita-
tion found in the dependent claims. They have therefore
waived any argument that Dorenbusch does not disclose
those limitations.3
3 The plaintiffs’ waiver is clear in light of the 28-page
long chart that the defendants filed as an exhibit to their
brief, which goes through each claim of the ’664 patent and
asserts why each limitation is anticipated by Dorenbusch.
See App. 1347 (“Exhibit C clearly and convincingly demon-
strates that each and every restriction, element, and limi-
tation of the asserted claims of the ‘664 patent is present
in the Dorenbusch patent.”); Dkt. No. 148-3 (Exhibit C).
The defendants filed their brief a week before the plaintiffs,
but the plaintiffs chose not to address any limitation other
than the “extension of the upper surface” limitation and the
“limits unintentional lifting” limitation.
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LOWE v. SHIELDMARK, INC. 14
As to the two limitations in dispute, the plaintiffs first
argue that Dorenbusch does not disclose the “extension of
the upper surface” limitation because “[a]s apparent from
the drawing of Fig. 4 of [Dorenbusch] . . . the edges 13 are
sharply cut and are separate and distinct from the top sur-
face of the marker, not an extension of the top surface as
required by the claims of the ‘664 patent.” Blue Br. at 40.
The plaintiffs, however, do not explain the basis for their
assertion that “separate and distinct side surfaces” do not
constitute an “extension of the top surface.”4 Id.; see also
Yellow Br. at 20 (arguing that the surfaces of the walls of
a room are “clearly not” extensions of the surface of the ceil-
ing and that the four distinct sides of a trapezoid are not
“an extension of the other”). At most, the plaintiffs argue
that “[a] smooth transition at the edge is required for slid-
ing or dragging pallets, skids, and the like across a factory
floor as with the invention of the ‘664 Patent.” Blue Br. at
40–41.
Next, the plaintiffs argue that Dorenbusch does not
disclose the “limits unintentional lifting” limitation be-
cause the title and abstract of Dorenbusch characterize the
spot markers as “temporarily marking a surface” and being
“readily lifted from the surface” on which they are placed.
Id.at 41. The plaintiffs also point out that Dorenbusch uses
an adhesive as merely an option and that the Dorenbusch
specification states that “[a]n adhesive with a low degree of
adhesion is used so as not to unduly make difficult the spot
marker’s removal from the surface.” Id. (quoting App. 66,
col. 3, ll.18–20).
We find no error in the district court’s grant of sum-
mary judgment of anticipation by Dorenbusch. Based on
4 The parties’ joint proposed claim construction to
the district court did not include the term “extension.” See
App. 1486–95.
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LOWE v. SHIELDMARK, INC. 15
the disputed limitations, no reasonable jury could find that
Dorenbusch does not anticipate the ’664 patent.
“[A]n independent claim should not be construed as re-
quiring a limitation added by a dependent claim.” Curtiss-
Wright Flow Control Corp. v. Velan, Inc., 438 F.3d 1374,
1380 (Fed. Cir. 2006). We therefore do not read claim 1 of
the ’664 patent as requiring the “upper surface of the body
[to be] smoothly curved between the lateral edge portions”
(claim 3) or “the upper surfaces of the lateral edge portions
[to be] smoothly tapered” (claim 5). ’664 patent, col. 5, ll.
40–41, 46–47. Based on that differentiation, a lateral edge
that is an “extension of the upper surface” in claim 1 simply
means a lateral edge that is connected to the upper surface.
And Dorenbusch recites a spot marker that has “peripheral
edges beveled downwardly at an about 30 degree to about
60 degree angle to the horizontal.” App. 66, col. 4, ll. 9–11.
No reasonable jury could find that those peripheral edges
of Dorenbusch are not “an extension of the upper surface”
of the spot markers.
Dorenbusch further recites a spot marker that has “a
non-slip bottom surface for resisting lateral forces,” id. at
col. 4, ll. 11–12, and the Dorenbusch specification states
that the “non-slip bottom surface . . . resists lateral forces
to remain in place during use,” App. 65, col. 1, ll. 55–57. By
its terms, limiting unintentional lifting does not foreclose
intentional lifting of the floor marking tape. No reasonable
jury could find that Dorenbusch fails to disclose the “limits
unintentional lifting” limitation.
Accordingly, the district court did not err in granting
summary judgment for the defendants on their counter-
claim of patent invalidity.
IV
The plaintiffs next object to the district court’s dismis-
sal of their claim of false advertising under the Lanham
Act. The Lanham Act prohibits any person from using in
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LOWE v. SHIELDMARK, INC. 16
commerce any “false or misleading description of fact” in
commercial advertising or promotion that misrepresents
the nature, characteristics, or qualities of that person’s
goods. 15 U.S.C. § 1125(a)(1)(B). Liability arises under the
Lanham Act if the commercial message “is either (1) liter-
ally false or (2) literally true or ambiguous but has the ten-
dency to deceive consumers.” Innovation Ventures, LLC v.
N.V.E., Inc., 694 F.3d 723, 735 (6th Cir. 2012) (cleaned up).
As it did below, Spota argues that ShieldMark’s statements
regarding is “Mighty Line” tape were literally false.
“Only an unambiguous message can be literally false.”
Id. at 737 (cleaned up). “[R]easonable consumers know
that marketing involves some level of exaggeration—what
the law calls ‘puffery.’” Wysong Corp. v. APN, Inc. (17-
1975), 889 F.3d 267, 271 (6th Cir. 2018). “Courts thus view
Lanham Act claims challenging hyperbolic advertising
with a skeptical eye.” Id.; see also Interactive Prods. Corp.
v. a2z Mobile Off. Sols., Inc., 326 F.3d 687, 699 (6th Cir.
2003) (“[M]ere puffery . . . is not actionable under the Lan-
ham Act.”).
The three advertising statements at issue in this case
are: (1) Mighty Line Floor Tape’s “[b]eveled edge tape can
take a beating from industrial wheel traffic”; (2) “Mighty
Line Floor Tape withstands industrial brush scrubbers,
forklifts, and heavy industrial wheel traffic”; and (3)
Mighty Line Floor Tape’s “[b]eveled edges increase dura-
bility for forklift traffic.” App. 26–27.
Spota argues that those statements are literally false
because ShieldMark “necessarily admitted . . . its product
unintentionally lifts from the floor.” Blue Br. at 44. That
is, Spota points out that ShieldMark asserted non-infringe-
ment on the basis that the Mighty Line tape does not sat-
isfy the claim limitation requiring that the product “limits
unintentional lifting of the floor marking tape from the
floor.” Id. Spota also points out that ShieldMark argued
that the Mighty Line tape was no different from its
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LOWE v. SHIELDMARK, INC. 17
previous product, DuraStripe, and that DuraStripe had a
disclaimer that it was “not warranted against damage
caused by items pushed or dragged across the product, such
as skids or pallets.” Id. at 45.
Even assuming that the Mighty Line floor tape can be
unintentionally lifted from the floor, no reasonable jury
could find that statements about “increase[d] durability” or
“withstand[ing]” or “tak[ing] a beating” from industrial
wheel traffic were unambiguously false.5 Each of those
terms accommodates variations in degrees. As the district
court put it, “Defendant’s statements make no measurable
promises other than that Mighty Line Floor Tape probably
falls somewhere between tape that disintegrates at the
lightest touch and tape strong enough to survive a nuclear
bomb.” App. 28. Moreover, “[t]hose terms can just as easily
refer to a tape’s ability to resist abrasion, discoloration, or
deformation when forklifts and other machines pass over
it.” Id.
5 Spota suggests in its reply brief that those state-
ments are literally false because the Mighty Line tape does
not even have “beveled edges” to begin with. See Yellow
Br. at 25. But that argument is waived. In addition to be-
ing raising it only in the reply brief, Spota asserted below
that “Plaintiffs have never alleged that the accused tape
does not have ‘beveled edges’; rather, Plaintiffs have al-
ways alleged the accused tape does not have the claimed
edges.” App. 2096.
Spota also makes an argument based on Novartis Con-
sumer Health, Inc. v. Johnson & Johnson-Merck Consumer
Pharm. Co., 290 F.3d 578, 586 (3d Cir. 2002), for the first
time in the reply brief. Because that argument was not
raised in Spota’s opening brief, it has been waived.
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LOWE v. SHIELDMARK, INC. 18
The district court did not err in granting summary
judgment on Spota’s false advertising claim.
V
Following the 2022 remand to the district court, Lowe
and Spota filed a motion to recuse or disqualify Judge
Gwin. App. 1238. The court denied the motion, and the
plaintiffs have appealed.
The Sixth Circuit “reviews decisions denying . . . mo-
tions to recuse under the abuse of discretion standard.”
Youn v. Track, 324 F.3d 409, 422 (6th Cir. 2003) (cleaned
up). The court “must have a definite and firm conviction
that the trial court committed a clear error of judgment be-
fore reversing under the abuse of discretion standard.” Id.
(cleaned up).
In Liteky v. United States, 510 U.S. 540 (1994), the Su-
preme Court set out the pertinent principles that apply to
judicial recusal. “First, judicial rulings alone almost never
constitute a valid basis for a bias or partiality motion,” and
“[a]lmost invariably, they are proper grounds for appeal,
not for recusal.” Id. at 555. “Second, opinions formed by
the judge on the basis of facts introduced or events occur-
ring in the course of the current proceedings, or of prior
proceedings, do not constitute a basis for a bias or partiality
motion unless they display a deep-seated favoritism or an-
tagonism that would make fair judgment impossible.” Id.
“Thus, judicial remarks during the course of a trial that are
critical or disapproving of, or even hostile to, counsel, the
parties, or their cases, ordinarily do not support a bias or
partiality challenge.” Id.
The facts alleged in Lowe’s affidavit (as well as in the
affidavits of plaintiffs’ counsel, Ray L. Weber and Laura J.
Gentilcore) focus on various statements the court made in
proceedings, in addition to orders the court entered regard-
ing scheduling, supplemental briefing, and the substitu-
tion of an expert witness. See App. 1254–65, 2714–20.
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LOWE v. SHIELDMARK, INC. 19
Those facts fail to support a “definite and firm conviction
that the trial court committed a clear error of judgment.”
Youn, 324 F.3d at 422. Accordingly, there was no abuse of
discretion in the district court’s denial of the plaintiffs’
recusal motion.
VI
A
The district court awarded the defendants fees and
costs incurred in litigating the plaintiffs’ patent infringe-
ment claim from December 2021 onwards, in the amount
of $213,765.6 App. 43. The district court cited both 35
U.S.C. § 285 and its inherent power to sanction as inde-
pendent grounds for the award. See id. at 37–39. We af-
firm the award under the district court’s inherent power to
sanction, which we review for an abuse of discretion. Youn,
324 F.3d at 420. It is therefore unnecessary to address the
parties’ arguments regarding section 285.
A district court has inherent power to “assess attor-
ney’s fees when a party has acted in bad faith, vexatiously,
wantonly, or for oppressive reasons.” Chambers v. NASCO,
Inc., 501 U.S. 32, 45–46 (1991) (cleaned up). The court may
assess attorney’s fees against a party that “shows bad faith
by delaying or disrupting the litigation.” Id. at 46. “The
imposition of inherent power sanctions requires a finding
of bad faith, or conduct tantamount to bad faith.” Youn,
324 F.3d at 420 (cleaned up).
6 Although the district court awarded fees and costs
beginning in December 2021, the defendants submitted fee
tables only from May 2022 because the case was inactive
at the district court level until April 2022, when we re-
manded the case from the first appeal. App. 41 n.46. The
district court accepted the defendants’ fee calculation.
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LOWE v. SHIELDMARK, INC. 20
The district court found that the plaintiffs’ actions from
December 2021 onwards “strongly support an inference of
bad faith.” App. 38. Specifically, the court found that early
on in discovery, the defendants had “requested production
of any documents relating to ownership and licensing of the
’664 patent” and that the only response the plaintiffs made
in July 2019 was that there were “no responsive docu-
ments.” App. 37. The district court further found that by
December 16, 2021, after both the Assignment and the PLA
were executed, the plaintiffs knew that they now had doc-
uments responsive to the request and that they had a duty
to supplement their discovery responses under Federal
Rule of Civil Procedure 26(e)(1)(A). Id. The district court
found that, despite such knowledge, “Plaintiffs (1) took no
initiative to supplement their productions; (2) refused to
produce the ownership and license documents when con-
fronted by Defendants; and (3) filed a Fourth Amended
Complaint in which Plaintiffs explicitly misrepresented to
Defendants and to this Court the status of the patent.” Id.
The plaintiffs argue that they did not “hide” the change
in ownership since a copy of the Assignment was publicly
available. Blue Br. at 55. The plaintiffs also argue that
the Assignment and the PLA had “no impact” on Lowe or
Spota’s “Article III or prudential standing,” suggesting that
the non-disclosure of those documents was therefore harm-
less or not in bad faith. Id. Finally, the plaintiffs point to
the fact that they produced the PLA to the defendants in
July 2022, “within 14 days after the issue was first raised
by Defendants.” Id. at 56. The plaintiffs, however, do not
dispute that they did not take the initiative to supplement
their discovery responses, nor do they deny that they mis-
represented the state of ownership in the Fourth Amended
Complaint, which was filed nearly six months after the
transactions in December 2021, and in which the plaintiffs
identified Lowe as the patent owner and Spota as the ex-
clusive licensee.
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LOWE v. SHIELDMARK, INC. 21
In their reply brief, the plaintiffs assert that they ad-
mitted in the district court that they had mischaracterized
the status of Lowe and Spota in their Fourth Amended
Complaint. Yellow Br. at 36. They also assert that discov-
ery “was over before the transfer” and that after remand,
they were “not looking at supplementation” because “they
were knee-deep in addressing allegations of invalidity, as
the district court directed briefing on the issue.” Id. at 36–
37.
Factual findings underlying sanctions based on the dis-
trict court’s inherent powers are reviewed for clear error.
Youn, 324 F.3d at 420. Applying that standard, we defer
to the district court’s implied finding that the plaintiffs’
misrepresentation in the Fourth Amended Complaint was
not merely an honest mistake. Moreover, the duty to sup-
plement discovery responses under Rule 26(e) continues
even after the discovery period has closed. See L.A. Termi-
nals, Inc. v. United Nat’l Ins. Co., 340 F.R.D. 390, 396 (C.D.
Cal. 2022) (collecting cases).
We discern no clear error in the district court’s finding
of bad faith conduct by the plaintiffs that prejudiced the
defendants. Lowe lost Article III standing after the Assign-
ment, and the plaintiffs’ conduct delayed litigation with re-
spect to Lowe’s patent infringement claim. We therefore
affirm the district court’s award under its inherent power
to sanction.
B
The district court also invoked its inherent power to
sanction in awarding the defendants fees and costs they in-
curred when they moved to seal an expert report that the
plaintiffs filed. App. 39.7 Local Patent Rule 2.2 for the
7 The district court held that although Federal Rule
of Civil Procedure 37(b) ordinarily governs discovery sanc-
tions, the rule “does not appear to encompass sanctions for
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LOWE v. SHIELDMARK, INC. 22
Northern District of Ohio provides that “[p]ending entry of
a protective order, discovery and disclosures deemed confi-
dential by a party shall be produced to the adverse party
for the eyes of outside counsel of record only, marked ‘At-
torney’s Eyes Only Subject to Protective Order[]’. . . and
shall not be disclosed to the client or any other person.”
The district court found that the plaintiffs violated that
rule by filing on the court’s public docket an expert report
that “disclosed information Defendants had marked as At-
torney’s Eyes Only.” Id. at 40. At the time of the filing, no
protective order had been entered by the court.
The district court, however, made no finding that the
plaintiffs acted in bad faith when filing that expert report.
See id. at 39–40. Nor did the district court make a finding
that Spota and Lowe’s conduct was tantamount to bad
faith. Id. Because the district court did not make the nec-
essary findings to invoke its inherent power to sanction, see
Youn, 324 F.3d at 420, we vacate the district court’s award
of $4,750 for fees and costs arising from the plaintiffs’ vio-
lation of Local Patent Rule 2.2 and remand for the required
findings.
VII
The defendants also sought fees for Lowe’s inequitable
conduct before the PTO, pointing to a photograph that
Lowe submitted during the prosecution of the ’664 patent.
The photograph shows two floor tapes side by side with no
other information than the statement that one was on sale
prior to 2004 and the other on sale in 2018. See App. 1988.
The defendants assert that Lowe was not forthcoming
about the prior-art DuraStripe tape and submitted the
violations of local discovery rules.” App. 39. The court thus
relied on its inherent power to sanction, which exists to “fill
in the interstices” not covered by sanction statutes and
rules. Id. at 39–40 (quoting Chambers, 501 U.S. at 46).
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LOWE v. SHIELDMARK, INC. 23
photograph of DuraStripe floor tape “without identifying it
as the prior-art DuraStripe floor tape with ‘unique beveled
edges’ that Lowe had advertised, distributed, and sold
through Insite Solutions more than one year before the . . .
priority date of the ‘664 Patent.” Gray Br. at 4–5.
“Inequitable conduct includes affirmative misrepresen-
tation of a material fact, failure to disclose material infor-
mation, or submission of false material information,
coupled with an intent to deceive.” Bd. of Educ. Ex rel. Bd.
of Trs. of Fla. State Univ. v. Am. Bioscience, Inc., 333 F.3d
1330, 1343 (Fed. Cir. 2003). We review for clear error the
district court’s determination of “whether the conduct
meets a threshold level of materiality” and “whether the
evidence shows a threshold level of intent to mislead the
PTO.” Id.; see also Star Sci., Inc. v. R.J. Reynolds Tobacco
Co., 537 F.3d 1357, 1365 (Fed. Cir. 2008) (holding that the
accused infringer must prove both materiality and intent
to deceive by clear and convincing evidence). It is only after
the threshold levels of materiality and intent have been es-
tablished that the district court is required to weigh them
and “determine whether the applicant’s conduct is so cul-
pable that the patent should be held unenforceable.” Am.
Bioscience, 333 F.3d at 1343. “We review the district
court’s ultimate determination of inequitable conduct un-
der an abuse of discretion standard.” Id.
The district court found that “Lowe did not hide the ex-
istence of DuraStripe or the possibility of prior art entirely”
and that “[b]ecause there was some limited effort to dis-
close, Defendants have not established by clear and con-
vincing evidence that Lowe intended to and did withhold
material information.” App. 36. We find no clear error to
those threshold determinations made by the district court,
even considering the defendants’ expert report and the de-
fendants’ argument on the difference that further infor-
mation would have been material to the prosecution. We
therefore affirm the district court’s finding on inequitable
conduct.
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LOWE v. SHIELDMARK, INC. 24
Each party shall bear its own costs for this appeal.
AFFIRMED IN PART, VACATED AND REMANDED
IN PART
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