Hawk Technology Systems, LLC v. Castle Retail, LLC

N OTE: This disposition is nonprecedential.
United States Court of Appeals
for the Federal Circuit
______________________
HAWK TECHNOLOGY SYSTEMS, LLC,
Plaintiff-Appellant
v.
CASTLE RETAIL, LLC,
Defendant-Appellee
______________________
2024-1116
______________________
Appeal from the United States District Court for the
Western District of Tennessee in No. 2:20-cv-02766-JPM-
tmp, Judge Jon P. McCalla.
______________________
Decided: November 14, 2025
______________________
P ETER J OSEPH CORCORAN, III, Corcoran IP Law PLLC,
Texarkana, TX, for plaintiff-appellant.
J USTIN J AMES HASFORD, Finnegan, Henderson,
Farabow, Garrett & Dunner, LLP, Washington, DC, ar-
gued for defendant-appellee. Also represented by J ASON
L EE ROMRELL .
______________________
Before REYNA, STOLL , and CUNNINGHAM , Circuit Judges.
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 2
REYNA, Circuit Judge.
Hawk Technology Systems, LLC appeals the award of
attorney fees by the U.S. District Court for the Western
District of Tennessee to Castle Retail, LLC. For the rea-
sons stated below, we affirm the district court.
BACKGROUND
Hawk Technology Systems, LLC (“Hawk”) owns U.S.
Patent No. 10,499,091 (“’091 patent”). The ’091 patent re-
lates to viewing multiple videos at the same time. J.A. 58,
8:31–33. Claim 1 of the ’091 patent is illustrative:
1. A method of viewing, on a remote viewing device
of a video surveillance system, multiple simultane-
ously displayed and stored video images, compris-
ing the steps of:
receiving video images at a personal computer
based system from a plurality of video sources,
wherein each of the plurality of video sources com-
prises a camera of the video surveillance system;
digitizing any of the images not already in digital
form using an analog-to-digital converter;
displaying one or more of the digitized images in
separate windows on a personal computer based
display device, using a first set of temporal and
spatial parameters associated with each image in
each window;
converting one or more of the video source images
into a selected video format in a particular resolu-
tion, using a second set of temporal and spatial pa-
rameters associated with each image;
contemporaneously storing at least a subset of the
converted images in a storage device in a network
environment;
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 3
providing a communications link to allow an exter-
nal viewing device to access the storage device;
receiving, from a remote viewing device remoted lo-
cated remotely from the video surveillance system,
a request to receive one or more specific streams of
the video images;
transmitting, either directly from one or more of
the plurality of video sources or from the storage
device over the communication link to the remote
viewing device, and in the selected video format in
the particular resolution, the selected video format
being a progressive video format which has a frame
rate of less than substantially 24 frames per second
using a third set of temporal and spatial parame-
ters associated with each image, a version or ver-
sions of one or more of the video images to the
remote viewing device, wherein the communication
link traverses an external broadband connection
between the remote computing device and the net-
work environment; and
displaying only the one or more requested specific
streams of the video images on the remote compu-
ting device.
J.A. 58–59, 8:31–9:5.
Hawk sued Castle Retail, LLC (“Castle”) in the U.S.
District Court for the Western District of Tennessee, alleg-
ing patent infringement. Castle moved to dismiss Hawk’s
complaint under Federal Rule of Civil Procedure 12(b)(6),
arguing that the ’091 patent is patent ineligible under
35 U.S.C. § 101.
Applying the Alice framework, the district court ruled
that under Step 1, the ’091 patent is directed to the ab-
stract idea of video storage display. Under Step 2, the court
found that nothing in the claims transforms the abstract
idea into patent-eligible subject matter. Hawk Tech. Sys.,
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 4
LLC v. Castle Retail, LLC, No. 2:20-cv-02766, 2021 WL
5832793, at *2–6 (W.D. Tenn. Sept. 15, 2021) (citing Alice
Corp. Pty. Ltd. v. CLS Bank Int’l, 573 U.S. 208 (2014)).
Concluding that claim 1 of the ’091 patent claimed patent
ineligible subject matter, the district court granted Castle’s
motion to dismiss Hawk’s complaint. Id. at *1. Hawk ap-
pealed the dismissal of its complaint, and we affirmed.
Hawk Tech. Sys., LLC v. Castle Retail, LLC, 60 F.4th 1349,
1356 (Fed. Cir. 2023).
Castle then moved the district court for attorney fees
under 35 U.S.C. § 285, 28 U.S.C. § 1927, and the court’s in-
herent authority. The district court awarded Castle attor-
ney fees under 35 U.S.C. § 285,1 reasoning that “[t]he
substantive weakness of [Hawk’s] litigation position in the
instant case weigh[ed] in favor of an exceptional case de-
termination.” J.A. 12. The district court explained that
while the ’091 patent was presumptively valid, it was “de-
monstrably weak on its face.” J.A. 12–13. The court ruled
that once Castle filed its motion to dismiss, “it should have
been abundantly clear to a reasonable party that [Hawk’s]
case was exceptionally weak.” J.A. 13, 16 (citation modi-
fied). The district court further observed that Hawk’s “boil-
erplate” complaint showed that it “clearly failed to engage
in reasonable pre-suit investigation.” J.A. 10. The district
court observed that Hawk had filed and settled hundreds
of patent suits, including numerous suits involving the
same patent, and that Hawk’s settlement negotiation con-
duct was “impolite and unprofessional.” J.A. 10–11, 14–16
(citation modified). Finding the case exceptional under
§ 285, the district court awarded fees starting from the
point at which Castle filed its motion to dismiss onwards.
J.A. 16. The district court denied the motion for attorney
1 Section 285 provides that “[t]he court in exceptional
cases may award reasonable attorney fees to the prevailing
party.” 35 U.S.C. § 285 (emphasis added).
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 5
fees under 28 U.S.C. § 1927 and its inherent authority.
J.A. 17–18.
Hawk timely appeals. We have jurisdiction under
28 U.S.C. § 1295(a)(1).
STANDARD OF REVIEW
We review a district court’s award of attorney fees un-
der § 285 for an abuse of discretion. Highmark Inc. v. All-
care Health Mgmt. Sys., Inc., 572 U.S. 559, 563–64 (2014).
An abuse of discretion occurs when “the district court has
made a clear error of judgment in weighing relevant factors
or in basing its decision on an error of law or on clearly
erroneous factual findings.” Bayer CropScience AG v. Dow
AgroSciences LLC, 851 F.3d 1302, 1306 (Fed. Cir. 2017) (ci-
tation modified).
Section 285 provides that “[t]he court in exceptional
cases may award reasonable attorney fees to the prevailing
party.” 35 U.S.C. § 285.
D ISCUSSION
Hawk raises two primary arguments on appeal. First,
Hawk argues that the district court abused its discretion
in awarding Castle attorney fees because the court sealed
“nearly the entirety of the briefing and exhibits related to”
the fees motion, thereby prejudicing Hawk’s ability to de-
fend against Castle’s motion. Appellant Br. 7–17. Second,
Hawk argues that the district court abused its discretion
in finding that this case is “exceptional” under 35 U.S.C.
§ 285. Id. at 17–40. We address each argument in turn.
I.
We conclude that Hawk has forfeited the first issue by
failing to raise it before the district court. “[A] position not
presented in the tribunal under review will not be consid-
ered on appeal in the absence of exceptional circum-
stances.” In re Google Tech. Holdings LLC, 980 F.3d 858,
863 (Fed. Cir. 2020).
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 6
Castle filed its motion for fees and various exhibits
thereto in the district court litigation under seal. Appel-
lant Br. 7–13. Hawk never opposed Castle’s motions to seal
those filings or otherwise raised the issue of improper seal-
ing in the underlying litigation. Appellee Br. 36–37. To
the contrary, Hawk filed consent motions to file additional
documents under seal in connection with Castle’s motion
for fees. See, e.g., J.A. 934–39. Hawk now asserts for the
first time that the district court’s sealing orders were “over-
broad, not narrowly tailored, and precluded Hawk’s coun-
sel from sharing any portion of the parties’ briefs and
sealed exhibits with their client.” Appellant Br. 16. But
Hawk makes no effort to explain why it never asserted be-
fore the district court that sealing was improper, or why it
consented to additional sealing. In re Google, 980 F.3d
at 863–64. Given these circumstances, we do not find ex-
ceptional circumstances exist warranting us to hear the ar-
gument for the first time on appeal. Accordingly, we
decline to consider Hawk’s first argument based on its for-
feiture. See Netflix, Inc. v. DivX, LLC, 84 F.4th 1371, 1382
(Fed. Cir. 2023).
II.
Hawk argues the district court abused its discretion in
ruling that this is an exceptional case under Section 285.
As noted above, Section 285 provides that “[t]he court in
exceptional cases may award reasonable attorney fees to
the prevailing party.” 35 U.S.C. § 285 (emphasis added).
The Supreme Court has explained that an exceptional case
“is simply one that stands out from others with respect to
the substantive strength of a party’s litigating position
(considering both the governing law and the facts of the
case) or the unreasonable manner in which the case was
litigated.” Octane Fitness, LLC v. ICON Health & Fitness,
Inc., 572 U.S. 545, 554 (2014). A Section 285 inquiry is gen-
erally “rooted in factual determinations.” Highmark,
572 U.S. at 564. District courts have discretion as to
whether to award attorney fees and consider the totality of
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 7
the circumstances when making that determination. Oc-
tane Fitness, 572 U.S. at 554.
Here, the district court determined the case was excep-
tional under the totality of the circumstances, including be-
cause (1) Hawk’s “pattern of engaging in frivolous patent
lawsuits . . . weighed in favor of an exceptional case deter-
mination”; (2) the ’091 patent was “demonstrably weak on
its face”; and (3) Hawk’s settlement negotiation conduct
was “impolite and unprofessional.” J.A. 10, 13, 15 (citation
modified). Hawk argues that the district court abused its
discretion because each of these determinations was erro-
neous. We address each of Hawk’s arguments in turn.
First, Hawk argues the district court abused its discre-
tion by erroneously finding Hawk engaged in a pattern of
frivolous lawsuits. Appellant Br. 18. Hawk asserts the dis-
trict court provided “no evidence” that its other patent law-
suits were frivolous. Id. at 19. But Hawk’s own briefing
belies this argument. Hawk spends twelve pages rebutting
the evidence the district court relied on in reaching its find-
ing. Id. at 18–30. For example, the district court consid-
ered the “brief and boilerplate” nature of Hawk’s
complaint, and the fact that it lacked “particularized alle-
gations” against Castle. J.A. 10–11. The district court also
considered the vast number of patent suits Hawk had filed
(including numerous suits involving the ’091 patent) and
the average settlement amounts in those lawsuits.
J.A. 11–12. Based on these considerations, the district
court found Hawk to have engaged in a pattern of frivolous
patent litigation and considered this to be one factor
“weigh[ing] in favor of an exceptional case determination.”
J.A. 10 (citing Eon-Net v. Flagstar Bancorp, 653 F.3d 1314
(Fed. Cir. 2011)). Based on this record, the district court
did not clearly err in finding that Hawk engaged in a
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 8
pattern of frivolous lawsuits.2 Thus, there is no abuse of
discretion in the district court’s consideration of Hawk’s
pattern of frivolous lawsuits in determining exceptionality.
SFA Sys., LLC v. Newegg Inc., 793 F.3d 1344, 1350 (Fed.
Cir. 2017) (“[A] pattern of litigation abuses characterized
by the repeated filing of patent infringement actions for the
sole purpose of forcing settlements, with no intention of
testing the merits of one’s claims, is relevant to a district
court’s exceptional case determination under § 285.”).
Second, Hawk argues the district court abused its dis-
cretion by erroneously finding Hawk’s validity case so
weak that “no reasonable litigant could have reasonably
expected success on the merits.” Appellant Br. 32. Hawk
argues that it justifiably relied on the statutory presump-
tion of validity and therefore had “no reason to believe that
the ’091 patent was invalid.” Id. at 30, 32. But the district
court took the presumption of validity into account, finding
that the ’091 patent was “demonstrably weak on its face,
despite the initial presumptions created when the patent
was issued by the PTO.” J.A. 12–13 (citing Edekka LLC v.
3balls.com, Inc., No. 2:15-cv-541, 2015 WL 9225038, at *2
(E.D. Tex. Dec. 17, 2015)) (emphasis added). The district
court pointed to specific “untenable” positions Hawk took
after Castle filed its motion to dismiss the ’091 patent as
being invalid under 35 U.S.C. § 101. E.g., J.A. 13
2 The district court also found that Hawk was a non-
practicing entity and suggested that such entities may pro-
ceed in patent litigation with little business risk. J.A. 10.
Were this generalization the basis for the district court’s
exceptional case finding or its pattern of frivolous filings
finding, that would be erroneous. We read the district
court’s opinion, however, as relying on specific evidence of
Hawk’s filing of prior suits for the purpose of obtaining set-
tlements as opposed to relying on Hawk’s status as a prac-
ticing or non-practicing entity.
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 9
(discussing Hawk’s argument that “temporal and spatial
parameters” were the inventive concept “when there is sub-
stantial case law holding that such data manipulation
claims and uses of mechanical formulas are abstract”).
Further, Hawk’s argument, if accepted, contradicts the Su-
preme Court’s holding in Octane that the “substantive
strength of the party’s litigating position” is relevant to the
exceptional case determination. 572 U.S. at 554. We find
no abuse of discretion in the district court’s consideration
of the weakness of Hawk’s litigation position in its deter-
mination of exceptionality.
Third, Hawk argues that the district court abused its
discretion by attributing the “impolite and unprofessional”
litigation conduct of Hawk’s lawyers to Hawk. Appellant
Br. 35–36. We agree with Castle that this argument is
without merit. Appellee Br. 31. The district court relied
on emails sent from Hawk’s counsel to Castle’s counsel as
evidencing Hawk’s unreasonable litigation conduct.
J.A. 14–15. In one such email, Hawk’s counsel conveyed
Hawk’s position that it would pursue other members of a
grocer association to which Castle (a small grocery store
chain) belonged. J.A. 14 (citing J.A. 167). We find the dis-
trict court did not clearly err by attributing this litigation
conduct to Hawk.
Hawk further argues that, even if attributable to
Hawk, the cited conduct does not warrant a finding of ex-
ceptionality because it does “not rise to a sanctionable
level.” Appellant Br. 37. Again, Hawk’s argument directly
contradicts Octane. Per Octane, a district court may award
attorney fees when a party’s “unreasonable conduct—while
not necessarily independently sanctionable—is nonethe-
less so ‘exceptional’ as to justify an award of fees.” 572 U.S.
at 555. In addition, the district court did not base its award
on this alone.
In sum, we find that the district court did not abuse its
discretion in determining—under the totality of the
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HAWK TECHNOLOGY SYSTEMS, LLC v. CASTLE RETAIL, LLC 10
circumstances—that the case was exceptional under Sec-
tion 285.
CONCLUSION
We have considered the parties’ remaining arguments
and find them unpersuasive. For the reasons stated, we
affirm.
AFFIRMED
COSTS
Costs against Hawk.
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