# United States **Court of Appeals**  **for the Federal Circuit**

______________________ HAWK TECHNOLOGY SYSTEMS, LLC, Plaintiff - Appellant v. CASTLE RETAIL, LLC, Defendant - Appellee

______________________ 2022 - 1222

______________________ Appeal from the United States District Court for the Western District of Tennessee in No . 2:20 - cv - 02766 - JPM tmp, Chief Judge Jon P . McCalla.

______________________ Decided: February 17, 2023

______________________ F. C HRISTOPHER A USTIN , Weide & Miller, Ltd., Las Vegas, NV, for plaintiff - appellant. J USTIN J AMES H ASFORD , Finnegan, Henderson,Farabow, Garrett & Dunner, LLP, Washington, DC, for defendant - appellee. Also represented by S TEFAN O CHIANA ; R OBERT M ARK F IELD , Evans Petree PC, Memphis, TN.

______________________ Before R EYNA , H UGHES , and C UNNINGHAM , Circuit Judges . R EYNA , Circuit Judge . Case: 22-1222 Document: 30 Page: 1 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 2 Appellant Hawk Technology Systems, LLC sued Appellee Castle Retail , LLC in the Western District of Tennessee for patent infringement based on Castle Retail’s use of security surveillance video operations in its grocery stores . Castle Retail moved to dismiss under Federal Rule of Civil Procedure 12(b)(6) for failure to state a claim . I t argued that the asserted patent claims were directed to ineligible subject matter and therefore invalid under 35 U.S.C . § 101 . T he district court granted the motion . It found that the patent claims were directed to the abstract idea of storin g and displaying video and failed to provide an inventive step that transformed th at abstract idea into a patent - eligible invention . The district court entered judgment dismissing Hawk’s case. Hawk appeals . For the reasons below, w e affirm . B ACKGROUND A. Technical Background Hawk is the owner of U.S. Patent No . 10,499,091 (the “ ’091 patent”) . The ’091 patent is titled “high - quality, reduced data rate streaming video product and monitoring system .” ’091 patent , at [54] . The underlying patent a pplication was filed on June 5, 2017 , and issued as the ’091 patent on December 3 , 2019, claiming priority back to September 17, 200 2 . Id . The ’091 patent relates to a method of viewing multiple simultaneously displayed and stored vide o images on a remote viewing device of a video surveillance system . Id . at 8:31

– 33 . Figure 3 of the patent shows a video surveillance system “in accordance with the invention” that has multiple cameras 302, broadband connection 310, a server 312, and a monitor control system 314: Case: 22-1222 Document: 30 Page: 2 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 3

Id . at 3:1 –3, 5:26

– 38 . The patent explains that , in this configuration, the signals from the cameras are transmitted as streaming sources at relatively low data rates and variable frame rates via a broadband connection . Id . at 5:28

– 50 . T his, it says, results in reduced costs to the user, lower memory storage requirements, and the ability to handle alarger monitoring application (due to bandwidth efficiency) . Id . This configuration, the patent notes , uses “existing broadband infrastructures” and a “generic PC - based server.” Id . at 5:39

– 45 . The ’091 patent concludes with six claims. 1 C laim 1 recites:

1 Because Hawk does not meaningfully argue that there is any distinctive significance between the six claims Case: 22-1222 Document: 30 Page: 3 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 4 1 . A method of viewing, on a remote viewing device of a video surveillance system, multiple simultaneously displayed and stored video images, comprising 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 comprises 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 tempor al 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 resolution, using a second set of temporal and spatial parameters associated with each image ; contemporaneously storing at least a subset of the converted images in a storage device in a network environment; for eligibility purposes , w e treat claim 1 as representative and refer generally to the ’091 patent “claims .” See Berkheimer v. HP Inc ., 881 F.3d 1360 , 1365 (Fed. Cir. 2018) (c laims may be treated as “representative” if a patenteemakes no “meaningful argument for the distinctive significance of any claim limitations not found in the representative claim” ). Case: 22-1222 Document: 30 Page: 4 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 5 providing a communications link to allow an external viewing device to access the storage device; receiving, from a remote viewing device re moted located 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 communica tion 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 te mporal and spatial parameters associated with each image, a version or versions 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 a nd the network environment; and displaying only the one or more requested specific streams of the video images on the remote computing device. Id . at claim 1 . B. Castle Retail’s Rule 12(b)(6) Motion to Dismiss In October 2020, Hawk sued Castle Retail for infringing the ’091 patent based on the security surveillance video operations used by Castle Retail in its grocery stores . J.A. 269 –2 76; J.A . 2 75 ¶ 23 . Hawk alleged that “[t]he ’091 Patent provides solutions for the problem of more an d more Case: 22-1222 Document: 30 Page: 5 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 6 users demanding higher and higher quality video contentfor viewing, creating, and editing (which requires additional data) while the physical infrastructure for data transmission remains as it has been for decades.” J.A. 274 ¶ 17 . A ccording to the complaint, the ’091 patent claims “teach methods for generating, transmitting, receiving, and viewing high - quality video [—] including on a remote device such as a smart phone [—] with the innovation of significantly reducing the data - transmission burden.” Id . ¶ 18. In December 2020, Castle Retail moved to dismiss under Rule 12(b)(6) based on its assertion that the ’ 091 patent was invalid under 35 U.S.C . § 101 . J.A . 314 –338 . I t argued that the ’091 patent claims failed the two - step analysis set forth in Alice Corp . v . CLS Bank International , 573 U.S . 208 (2014) . J.A. 31 8 . The claims, it asserted , failed Alice step one because they are directed to the “ abstract concept ” of “ collecting, manipulating, displaying, and storing information , ” J.A . 326 , and failed Alice step two because they provide “conventional components ” that “ provide no invent ive concept , ” J.A . 328 –3 29 . Castle Retail attached t o its motion “independent evidence” (the “Palmer” and “ Washino” references) that “ confirm s that the steps in the ’091 patent claims merely involve ‘ well - understood, routine, conventional activity. ’ ” J.A . 332 –337 (citation omitted) . Hawk opposed the motion to dismiss in February 2021 . J.A. 436

– 456 . It argue d that Castle Retail was “prematurely seek[ing] to dispose of the case when material facts are in dispute” and that no claim term s had been construed . J.A. 436 . And it contended that the ’091 patent claims passed both Alice steps . J.A. 439

– 448 . As for Castle Retail’s reliance on Palmer and Washino , Hawk asserted that it was “ both premature and substantively improper atthe motion to dismiss stage and is actually not relevant (being instead highly confusing and misleading) for Section Case: 22-1222 Document: 30 Page: 6 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 7 101 analysis .” J.A. 450 –4 51 . Castle Retail replied on March 2, 2021 . J.A. 459

– 470 . On March 10, 2021, the district court held what it called a “technology briefing and Patent Scheduling Conference” (“technical briefing”) . J.A. 30 (Dkt . 36) , 472 –5 50 .According to the district court, it conducts a technical briefing “in each patent case typically.” J.A. 474 . A ttorneys for both parties and Castle Retail ’s CEO, Rick James , attended the technical briefing . J.A . 30 (Dkt . 36) . There, Hawk “gave an overvi ew of patent technology as related to ’ 091 Patent technology”; Castle Retail “presented schematic outline of ’ 091 Patent technology with timeline of development of related technologies and with limitations of patent application”; and “[s]tatements [were] h eard as to abstraction and Alice two - step analysis.” Id . T he district court also explained at the technical briefing that it had the Palmer and Washino references “that were filed . . . in support of the memorandum in connection with the motion under 12( b)(6), ” and that it had “looked through those.” J.A . 477 . Castle Retail’s counsel also discussed at the technical briefing other references— including “Hendricks” and “Allen”

— and referenced them in its schematic PowerPoint outline . J.A. 492

– 497; J.A. 551

– 573 . Hawk states that it “sought and was granted an opportunity by the trial court to provide its own written technical report to further describe the patented invention at issue” and that it did so o n March 18, 2021 . Appellant’s Br . 7 (citing J.A . 57 4–5 83) . This 10 - page document is described as a “ declaration ” from one of the ’091 patent’s named inventor s, Barry H . Schwab . J.A. 574 –5 83 . C. The District Court’s Decision On September 15, 2021, the district court granted Castle Retail’s motion to dismiss . Hawk Tech . Sys., LLC v . Castle Retail, LLC , No . 2:20 - cv - 02766 - JPM - tmp, 2021 WL 5832793, at *1 (W.D . Tenn . Sept . 15, 2021) ( Decision ) . It Case: 22-1222 Document: 30 Page: 7 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 8 found that the ’ 091 patent claims failed the two - part Alice test . Id . at *6. As f or Alice step one , the district court explained that t he ’091 p atent “essentially discloses a method of displaying and storing digital video taken from multiple cameras.” Id . at *1 . It noted that Hawk contended that the patent provide s a solution that allows for “conserving bandwi dth while preserving quality” and that the claims implement th at solution . Id . at *4 . It found, though , t hat “even using Hawk’s description of the limitations, it is not clear how the claims do more than take video surveillance and digitize it for display and storage in a conventional computer system.” Id . And it explained that surveillance monitoring “ has been a part of business practices since video cameras have been available.” Id . It also explained that , although Hawk identified the “tempor al and spatial parameters ” as the inventive concept and argued that “ converting the data using ” those “pa rameters” changes the nature of the data , neither the claims nor the specification “ explain what those parameters are or how they should be manipulated .” Id . And any manipulation , it continued, “ without additional concrete guidance would be a claim directed to an abstract idea.” Id . T he court thus found that the ’091 p atent is directed to an abstract idea : “ a method for storing and displaying video .” Id . at *3 (heading) (capitalization altered) . And it rejected Hawk’s contention that c laim construction issues prevented that finding , as Hawk ha d neither identified any such issues nor s hown how claim construction would render the cla ims non - abstract . Id . As for Alice step two , the district court explained that the claimed “analog - to - digital converter” and “personalcomputer based system” “are not technological improvements but rather generic computer elements” and that the“parameters and frame rate, considering how they are defined in the claims and specification, similarly, do not Case: 22-1222 Document: 30 Page: 8 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 9 appear to be more than manipulating data (in this case, images) in such a way that has been found to be abstract.” Id . at *5 . It also fou nd that the claims, “ read in light of the specification, do not show a technological improvement in video storage and display because the limitations can be implemented using generic computer elements,” and the “specification and claims do not explain or s how how themonitoring and storage is improved, except by using already existing computer and camera technology.” Id . The district court further rejected what it viewed as “Hawk’s attempt to create a factual dispute ” over what was routine and convention al, explaining that, because the p atent fails to disclose how to achieve the end result, a skilledartisan must be able to use routine and conventional methods to do so . Id . at *6 . According to the court, “[n]othing in the claims, understood in light of the specification, requires anything other than off - the - shelf, conventional computer, network, and display technology gathering, sending, and presenting the desired information.” Id . (quoting Elec . Power Grp., LLC v . Alstom SA , 830 F.3d 1350, 135 5 (Fed . C ir . 2016) ) . T he district court granted Cas tle Retail’s motion to dismiss a nd entered judgment against Hawk . J.A. 13 . Hawk appeals . We have jurisdiction under 28 U.S.C . § 1295(a)(1). D ISCUSSION We review the grant of a Rule 12(b)(6) motion to dismiss under the law of the applicable regional circuit —here, the Sixth Circuit . Universal Secure Registry LLC v . Apple, Inc. , 10 F.4th 1342 , 1345

– 46 (Fed . Cir . 2021) . T he Sixth Circuit reviews Rule 12(b) (6) dismissals de novo, “construing the complaint in the light most favorable to the plaintiffs, accepting their well - pleaded factual allegations as true, and drawing all reasonable inferences in their favor.” Allied Erecting & Dismantling Co . v . Genesis Equip . & Mfg., Inc., 805 F.3d 701, 707 (6th Cir . 2015) ( citation omitted) . “ [W]e need not accept as true legal conclusions or Case: 22-1222 Document: 30 Page: 9 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 10 unwarranted factual inferences.” DirecTV, Inc . v . Treesh , 487 F.3d 471, 476 (6th Cir . 2007) ( citation omitted ) . And “ [c ] onclusory allegations or legal conclusions masquerading as factual allegations will not suffice.” Bishop v . Lucent Techs., Inc ., 520 F.3d 516, 519 (6th Cir . 2008). Section 101 of the Patent Act states: “W hoever invents or discovers any new and useful pro cess, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title .” 35 U.S.C . § 101 . But § 101 “contains an important implicit exception : Laws of nature, natural phenomena, and abstract ideas are not patentable.” Alice Corp . v . CLS Bank Int’l , 573 U.S . 208, 216 (2014) ( citations omitted ) . T he Supreme Court has articulated a two - step test for examining patent eligibility when a patent claim alleged ly involve s such patent ineligible subject matter . Id . at 21 7– 18 . Under this “ Alice ” test, a claim falls outside § 101 if (1) it is directed to a patent - ineligible concept like an abstract idea, and (2) it lacks elements sufficient to transform the claim into a patent eligible application . SAP Am . , Inc . v . InvestPic, LLC , 898 F.3d 1161, 1166

– 67 (Fed . Cir . 2018) . We review § 101 patent eligibility under Federal Circuit law . Smart Sys . Innovations, LLC v . Chi . Transit Auth ., 873 F.3d 1364, 1367 (Fed . Cir . 2017) . Patent eligibility is ultimately a question of law that may be based on underlying factual findings . Berkheimer v . HP Inc. , 881 F.3d 1360, 1365 (Fed . Cir . 2018) . Patent eligibility may be resolved on a Rule 12(b)(6) mot ion “ where the undisputed facts, considered under the standards required bythat Rule, require a holding of ineligibility under the substantive standards of law.” SAP Am . , 898 F.3d at 1166 . A. T he district court found that t he ’ 091 patent claims are direc ted to an abstract idea and that they do not include Case: 22-1222 Document: 30 Page: 10 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 11 inventive concepts that could transform the subject matter into an eligible application of the abstract idea . We agree. 1. Alice step one In this case, u nder Alice step one , w e consider whether the claim is directed to an abstract idea . Among other things, we examine “what the patent asserts to be the focus of the claimed advance over the prior art.” Solutran, Inc . v . Elavon, Inc ., 931 F.3d 1161, 1168 (Fed . Cir . 2019) ( cleaned up ) . In doing so, we focus on the language of the a sserted c laims, considered in light of the specification . Yu v . Apple , 1 F. 4th 1040, 1043 (Fed . Cir . 2021) . Here, the district court concluded that the ’091 p atent claims are direct ed to the abstract idea of “storing and displaying video.” Decision , at * 3; see also id . at * 5 (“[T] he ’091 Patent is directed to the abstract idea of video storage and display . . . . ”) . We agree . T he claim s are direct ed to a method of receiving, displaying, converting, storing , and transmitting digital video “using result - based functional language.” Two - Way Media Ltd . v . Comcast Cable Commc ’ ns, L LC , 874 F.3d 1329, 1337 (Fed . Cir . 2017) . They require t he functional results of “ receiving video images ,” “ digitizing any of the images not already in digital form ,” “ displaying one or more of the digitized images ,” “ converting one or more of the video source images into a selected video format ,” “storing at least a subset of the converted images ,” “providing a communica tions link,” “ receiving . . . a request to receive one or more specific streams of the video images,” “transmitting

. . . a version of one or more of the video images,” and “displaying only the one or more requested specific streams of the video images . ” ’091 patent at claim 1 . The claims are similar to those we have found to be directed to abstract ideas . For example , we have held that “ encoding and decoding image data and . . . converting formats , including when data is received from one medium Case: 22-1222 Document: 30 Page: 11 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 12 and sent along through another , a re by themselves abstract ideas .” Adaptive Streaming Inc . v . Netflix, Inc ., 836 F . App ’x 900 , 903 (Fed . Cir . 2020) (collecting cases) . T he ’091 patent claims are directed to those same general abstract ideas

— displaying im ages , converting them into a format , transmitting them , and so on . Hawk argues that the ’091 patent claims are directed not to an abstract idea but to “a solution to a technical problem, specifically a multi - format digital video product system capable of maintaining full - bandwidth resolutionwhile providing professional quality editing and manipulation of images.” Appellant’s Br . 19

– 20 ( cleaned up ) . I t asserts that the technical problem is “conserving bandwidth while preserving data ” and that th is solution is a “specific implementation,” which can be achieved “ by performing special data conversion of the video streams” and by d igitizing and converting da ta to “ change the nature of the data .” Id . at 20, 27– 28 . T he claims, Hawk concludes, therefore are not abstract but are directed to eligible subject matter . Id . at 28 (citing TecSec, Inc . v . Adobe Inc ., 978 F.3d 1278 (Fed . Cir . 2020); Koninklijke KPN N.V . v . Gemalto M2M GmbH , 942 F.3d 1143 (Fed . Cir . 2019) ). Hawk’s arguments fail . T he analysis at step one “ must focus on” t he claim language . ChargePoint, Inc . v . Sema Connect, Inc. , 920 F.3d 759, 76 9 (Fed . Cir . 2019) (“Even a specificat ion full of technical details about a physical invention may nonetheless conclude with claims that claimnothing more than the broad law or abstract idea underlying the claims.”) . Here, the claims themselves do not disclose performing any “ special data conversio n” or otherwise describe how the alleged goal of “ conserving bandwidth while preserving data” is achieved . Nor , as the district court found, do the claims (or the specification) explain “ what th[e] [claimed] parameters are or how they should be manipulated .” Decision , at * 4 . And again, conver ting information from one format to another

— including changing Case: 22-1222 Document: 30 Page: 12 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 13 the format of video data or compress ing it

— is an abstract idea . Adaptive Streaming , 836 F . App ’x at 903 . Nor are the claims here like those we found eligible in TecSec and Koninklijke . The claims in TecSec , for example, provided a specific solution for computer data networks and required specific features like “accessing an ‘object - oriented key manager’ and specified uses of a ‘lab el’ as well as encryption for the access management. ” 978 F.3d at 1295

– 96 (citation omitted) . T he claims in Koninklijke provided a specific , concrete solution for catching previously undetectable systematic error s i n data transmission systems —“ by varying the way check data is generated by modifying the permutation applied to different data blocks .” 942 F.3d at 1151 (citations omitted) . In both cases, t he c laims “sufficiently capture [d] the inventors ’ asserted technical contribution to the prior art by reciting how the solution specifically improves the function of prior art . ” Id . T he claims here simply do not do that : They fail to recit e a specific solution to make the alleged improvement

— conserving bandwidth while preserving quality —“ concrete” and at most recite abstract data manipulation . Id . at 11 52 . Stated otherwise , the ’091 patent claims lack “sufficient recitation of how the purported invention improve[s] the functionality” of video surveillance systems and are “recited at such a level of result -oriented generality that those claims amount [] to a mere implementation of an abstract idea .” Id . (citation omitted). Because t he claims of the ’091 patent are directed to an abstract idea , w e proceed to Alice step two to determine if the claims are transformed into subject matter beyond the abstract idea itself . 2. Alice s tep two At Alice step two, we consider the claim elements— individually and as an ordered combination —“ to assess whether [they] transform the nature of the claim into a Case: 22-1222 Document: 30 Page: 13 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 14 patent - eligible application of the abstract idea. ” Two - Way Media , 874 F.3d at 1338 (citation omitted) . The district court found that the claims, “read in lightof the specification, do not show a technological improvement in video storage and display be cause the limitations can be implemented using generic computer elements,” and that the “specification and claims do not explain or showhow the monitoring and storage is improved, except by using already existing computer and camera technology.” Decision , at *5 . It thus found that the claims failed Alice step two . We agree . Hawk argues that the claims recite an inventive solution—one “ that achieve s . . . the benefit of transmitting the same digital image to different devices for different and perhaps divergent purposes, while using the same bandwidth , ” and that “ reference [s] specific tools (such as an analog- to - digital converter, where necessary), specific parameters (such as three different sets of temporal and spatial parameters), and even sp ecific frame rates (such as 24 frames per second). ” Appellant’s Br . 31

– 32 (citing ’ 091 patent at c laim 1 and claim 6) . But even if the claims achieved this purported solution, they “only use[] generic functional language to ” do so and require nothing “ o ther than conventional computer and network components operating according to their ordinary functions ” (e.g. , a “personal computer,” “storage device,” “external viewing device ,” etc.) . Two - Way Media , 874 F.3d at 133 9 (citation omitted) . We recognize that the claims include “parameters.” But the claims fail to specify precisely what the parameters are and the parameters at most concern abstract data manipulation

— image formatting and compression . Hawk does not dispute that the claims reci te conventional components

— a “personal computer,” “video sources,” an “ analog to - digital convert er,” a “storage device,” an “external viewing device,” a “communications link,” a “remote viewing Case: 22-1222 Document: 30 Page: 14 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 15 device,” and a “remote computing device”

— to perform the method . See Appellant’s Br . 46 & n.10 (explaining that the ’091 patent’s solution uses “existing commercial hardware (computer and camera) devices”); Appellant’s Reply Br . 17 n.8 . The ’091 patent itself confirms that the invention ismeant to “utiliz[e] existing broadband media and other conventional technologies.” ’091 patent at 1:64

– 2:2; see also id . at 2:15

– 20, 5:39

– 45, 7:14

– 26 . S imply stated , “ [n] othing in the claims, understood in light of the specificatio n, requires anything other than off - the - shelf, conventional computer, network, and display technology for gathering, sending, and presenting the desired information.” Elec . Power Grp . , LLC v . Alstom S.A ., 830 F.3d 1350, 1355 (Fed . Cir . 2016). Nor do we se e—nor has Hawk pointed to —a nything inventive in the ordered combination of the claim limitations . Indeed, “ merely reciting an abstract idea performed on a set of generic computer components, as [the claims] do [] here, would ‘ not contain an inventive concept. ’” Two - Way Media , 874 F.3d at 133 9 (quoting BASCOM Glob . Internet Servs., Inc . v . AT&T Mobility LLC , 827 F.3d 1341, 1350 (Fed . Cir . 2016) ) . We therefore find that the ’091 patent claims fail to transform the abstract idea into something more and thus fail Alice step two . We hold that the ’091 patent is patent ineligible because its claims are directed to an abstract idea and fail to transform that abstract idea into patent - eligible subject matter . B. Hawk asserts that the district court erred in it s decision to grant Castle Retail’s motion to dismiss because the motion was procedurally premature under Rule 12 . Appellant’s Br . 6– 11 . According to Hawk, the district court considered testimony and evidence

— Castle Retail’s cited Case: 22-1222 Document: 30 Page: 15 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 16 references, Castle Retail’s schematic PowerPoint, Castle Retail’s CEO’s statements at the technical briefing, and Hawk’s po st - technical briefing report

— in deciding the motion . Id . at 7 –9 . Hawk contends that under Rule 12(d), the district court was required to convert the motion to a Rule 56 motion for summary judgment . Id . at 9

– 10 (relying on CODA Dev . S.R.O. v . Goodyear Tire & Rubber Co ., 916 F.3d 1350 (Fed . Cir . 2019)) . Hawk argues that we must reverse or vacate the district court’s decision so that the parties may take discovery to fully develop the evidence, including expert testimony and reports . Id . at 10

– 11 . We dis agree . Because this is a procedural issue not unique to patent law, we look to the law of the applicable regional circuit

— here , the Sixth Circuit . See Athena Diagnostics, Inc . v . Mayo Collaborative Servs., LLC , 915 F.3d 743, 755

– 56 (Fed . Cir . 2019) (applying First Circuit law to determine whether the district court erred in dismissing under Rule 12(b)(6) when the defendant had included an expert declaration with its opposition) . Under Sixth Circuit law, a motion to dismiss must ordinarily be d ecided without resort to matters outside the pleadings . Gavitt v . Born , 835 F.3d 623, 640 (6th Cir . 2016) . Under Rule 12(d) , if “matters outside the pleadings are presented to and not excluded by the court, the motion must be treated as one for summary j udgment under Rule 56.” Fed . R . Civ . P . 12(d) (emphasis added) . “[A] district court ’ s failure to expressly reject evidence attached to the briefs triggers its duty to treat the motion as one for summary judgment. ” Bates v . Green Farms Condo . Ass’n , 958 F.3d 470, 484 (6th Cir . 2020) . A s explained above, Castle Retail attached the Palmer and Washino references to its motion and presented and submitted a schematic PowerPoint that discussed th ose and other references . Hawk also alleges that it submitt ed a “declaration” or “report” after the technical briefing . Because matters outside the pleadings were presented to the district court, under Sixth Circuit law, the district court should have either (1) expressly rejected those m atters or Case: 22-1222 Document: 30 Page: 16 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 17 (2) converted t he motion to one for summary judgment and notified the parties that it plan n ed to convert the motion and give them a reasonable opportunity to present all the pertinent material . Bates , 958 F.3d at 484 . Here, the court erred when it did not expressly rej ect the outside matters or treat the motion as one for summary judgment under Rule 56 . But we hold that the district court’s error was harmless. The Sixth Circuit has “ held that the failure to convertthe motion to a motion for summary judgment is not rev ersible error if the court ’ s ‘ rationale ’ in no way ‘ hinged on the additional information provided there. ’” Id . (quoting Yeary v . Goodwill Indus. - Knoxville, Inc ., 107 F.3d 443, 445 (6th Cir . 1997 )) . In other words, if the appellate court can justify the dismissal without reference to any extraneous matters , it can treat the error as harmless . Id . (citing 5C C HARLES A LAN W RIGHT ET AL . , Fed. Prac . and Proc . § 1364, at 63 (3d ed . Supp . 2019) ) . Our review of the district court’s opinion here indicates that t he district court ’s analysis did not hinge on the additional information provided . Yeary , 107 F.3d at 445 ; Bates , 958 F.3d at 484 . Although t he record does not reflect that the district court expressly rejected these materials, thedistrict court does not discuss these materials in its decision . Hawk argues that the district court’s opinion “draw[s] upon” the technical briefing, pointing out that the opinion not es that the district court held a technica l briefing and reference s statements that Hawk ’ s counsel made at the technical briefing . Appellant’s Br . 9 (citing Decision , at * 2, 4) . But Hawk does not establish that the district court ’s decision hinged on any attorney statements that raise new facts that constitute matter beyond the pleadings . Further, that the district court held a technical briefing is simply a procedural fact . To be sure, where a district court holds a technical briefing, e.g., a technical tutorial, and no matters outside the pl eading are presented, it need Case: 22-1222 Document: 30 Page: 17 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 18 not convert the motion to one for summary judgment under Rule 56 .Hawk also argues that Castle Retail’s CEO was a witness at the technical briefing; that his statements at the technical briefing prompted the district court t o discuss “off - the - shelf components”; and that the district court then relied on this exchange when it used the phrase “off - the shelf” in its decision granting the motion to di s miss . Appellant’s Br . 8 . This misconstrues the record . I n using the phrase “off - the - shelf” in its opinion, the district court was plainly referencing case law. 2 Hawk does not point to any support in the record to suggest that t he district court in any way hinged its decision on extraneous materials . Hawk cla ims support in our decision in CODA Dev . S.R.O. v . Goodyear Tire & Rubber Co ., 916 F.3d 1350 (Fed . Cir . 2019) . But CODA is distinguishable from this case . In CODA , the district court had extensively relied on outside material

— an article

— in its analysis s upporting its decision to dismiss a complaint forcorrection of patent inventorship and trade secret misappropriation . 916 F.3d at 1356 , 1360 (explaining that “th e bulk of the [district] court ’ s prior - art analysis rested on the Hrabal article ” and that the court “ used the Hrabal article to ‘ determine whether it was a 2008 public disclosure of something Coda now claims was secret when disclosed to Goodyear in 2009 ’”) . We find no such reliance in this case . We also note that t he district court here “ expressly stated that it was ruling under 12(b)(6), and its analysis was based wholly on the legal sufficiency, vel non , of the plaintiff ’ s claim. ” Yeary , 107 F.3d at 445 . And, as shown above , the dismissal here can be justified without reference to any extraneous matters . Bates , 958 F.3d at 484 . Nor,

2 And as Castle Retail notes, the ’091 patent itself uses the phrase “off - the - shelf.” ’091 Patent at 4:4. Case: 22-1222 Document: 30 Page: 18 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 19 we observe, does Hawk meaningfully argue that its outside “report” from the named inventor raises any specific factual issues . That is un surprisin g: Again, t he practices of displaying images, converting them, and transmitting them, “ with nothing more, are practices whose implicit exclusion from § 101 undergirds the information - based category of abstract ideas .” FairWarning IP, LLC v . Iatric Sys . , Inc. , 839 F.3d 1089, 1097

– 98 ( Fed. Cir. 2016) (cleaned up) (rejecting argument that the district court wrongly found facts outside the pleadings) . Finally, w e note that Hawk’s opposition brief never a sserted that the district court was required to treat the motion as a motion for summary judgment . See Bates , 958 F.3d at 485 . To be sure, Hawk argued that the motion was “premature,” J.A. 436, and that Castle Retail’s reliance on the references was “ premature and substantively improper , ” J.A. 450 . But it failed to argue as it now does that Rule 12(d) applied; it failed to cite the CODA case it now relies on; and it failed to move the district court to convert the motion into one for summary judgment under Rule 56 and deny the motion so that Hawk could conduct full discovery . And althou gh Hawk did ask the district court to “alternative[ly]” “afford . . . Hawk the opportunity to amend its Complaint,” J.A . 455, Hawk did so in a single conclusory sentence at the end of its opposition and without explaining how it proposed amending the compl aint and what difference the amendment would make . The record also does not show that Hawk ever moved to amend . In short, w e are not persuaded to fault the district court under these circumstances , and we thus treat its error in failing to convert the m otion to dismiss in to a motion for summary judgment as harmless . See Bates , 958 F.3d at 485 . C ONCLUSION We have considered Hawk’s other arguments but find them un persuasive . For the above reasons, we affirm the Case: 22-1222 Document: 30 Page: 19 Filed: 02/17/2023HAWK TECHNOLOGY SYSTEMS , LLC v. CASTLE RETAIL , LLC 20 district court ’s grant of Castle Retail’s Rule 12(b)(6) motion to dismiss based on subject - matter ineligibility under § 101. AFFIRMED C OSTS No costs. Case: 22-1222 Document: 30 Page: 20 Filed: 02/17/2023