N OTE : This disposition is nonprecedential. 

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

______________________ PACKET INTELLIGENCE LLC, Appellant

v.
JUNIPER NETWORKS, INC., PALO ALTO NETWORKS, INC., Cross

- Appellants

KATHERINE K. VIDAL, UNDER SECRETARY OF

COMMERCE FOR INTELLECTUAL PROPERTY AND DIRECTOR OF THE UNITED STATES PATENT AND TRADEMARK OFFICE, Intervenor

______________________
2022

- 1398, 2022

- 1400, 2022

- 1401, 2022

- 1403, 2022

- 1404, 2022

- 1405, 2022

- 1406

______________________ Appeals from the United States Patent and Trademark Office, Patent Trial and Appeal Board in Nos. IPR2020

- 00336, IPR2020

- 00337, IPR2020

- 00338, IPR2020

- 00339, IPR2020

- 00486.

______________________
Decided: May 2, 2024

______________________ Case: 22-1398 Document: 81 Page: 1 Filed: 05/02/2024PACKET INTELLIGENCE LLC v. JUNIPER NETWORKS , INC

. 2

R OBERT A LLAN B ULLWINKEL , Heim Payne & Chorush LLP, Houston, TX, argued for appellant. Also represented by C HRISTOPHER M ICHAEL F IRST , M ICHAEL F. H EIM

.
R. W ILLIAM S IGLER , Fisch Sigler, LLP, Washington, DC, argued for cross -a ppellant Juniper Networks, Inc. Also represented by A LAN M. F ISCH , J EFFREY M ATTHEW S ALTMAN

.
D OUGLAS H ALLWARD -D RIEMEIER , Ropes & Gray LLP, Washington, DC, argued for cross

- appellant Palo Alto Networks, Inc. Also represented by J AMES R ICHARD B ATCHELDER , A NDREW T. R ADSCH , East Palo Alto, CA.

O MAR F AROOQ A MIN , Office of the Solicitor, United States Patent and Trademar k Office, Alexandria, VA, for intervenor. Also represented by P ETER J. A YERS , R OBERT M C B RIDE , F ARHEENA Y ASMEEN R ASHEED

.

______________________
Before L OURIE , H UGHES , and S TARK , Circuit Judges

. S TARK , Circuit Judge

. Packet Intelligence LLC (“Packet”) ap peals the final written decisions of the Patent Trial and Appeal Board (“Board”) in inter partes review (“IPR”) proceedings findingcertain claims of its U.S. Patent Nos. 6,665,725 (“’725 patent”), 6,771,646 (“’646 patent”), 6,839,751 (“’751 patent”), and 6,954,789 (“’789 patent”) are unpatentable as obvious. 1

1 Specifically, i n IPR2020

- 00336, the Board foundclaims 10, 12, 13, 16, and 17 of the ’725 patent unpatentable. See Juniper Networks, Inc. v. Packet Intel. LLC
, IPR2020

- 00336, 2021 Pat. App. LEXIS 5456 , at *3 (P.T.A.B. Sept. 9, 2021). In IPR2020

- 00337, the Boardfound claims 1, 2, 7, 16, and 18 of the ’646 patent unpatentable and claim 3 of the ’646 patent not unpatentable. See Case: 22-1398 Document: 81 Page: 2 Filed: 05/02/2024PACKET INTELLIGENCE LLC v. JUNIPER NETWORKS , INC

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Juniper Networks, Inc. and Palo Alto Networks, Inc., (collectively, “Juniper”) cross

- appeal the Board’s final written decisions finding claim 3 of the ’646 patent and claim 34 of the ’789 patent are not unpatentable as obvious. We affirm in all respects. 2 Regarding Packet’s appeal s , on de novo review weagree with the Board that the correct construction of “conversational flow” in all challenged claims across all patents is a “sequence of packets t hat are exchanged in any direction as a result of an activity.” 3 E.g.
, J.A. 22. The intrinsic

J

uniper Networks, Inc. v. Packet Intel. LLC , IPR2020

- 00337, 2021 Pat. App. LEXIS 5517 , at *1 -2 (P.T.A.B. Sept

. 8, 2021). In IPR2020

- 00338, the Board found claims 1, 2, 5, 10, 14, 15, and 17 of the ’751 patent unpatentable. See J

uniper Networks, Inc. v. Packet Intel. LLC , IPR2020

- 00338, 2021 Pat. App. LEXIS 5520 , at *1 (P.T.A.B. Sept. 8, 2021). In IPR2020

- 00339 , the Board found claims 1, 2, 13

-17, 19, 20, 42, 44, 48, and 49 of the ’789 patent unpatentable. See Juniper Networks, Inc. v. Packet Intel. LLC
, IPR2020

- 00339, 2021 Pat. App. LEXIS 5525 , at *1 -2 (P.T.A.B. Sept. 8, 2021). In IPR2020

- 00486, the Board fou nd claims 31 and 33 of the ’789 patent unpatentable and claim 34 of that same patent not unpatentable. See Juniper Networks, Inc. v. Packet Intel. LLC , IPR2020

- 00486, 2021 Pat. App. LEXIS 5468 , at *1 (P.T.A.B. Sept. 9, 2021).

2 The Board had jurisdictio n pursuant to 35 U.S.C. § 316(c). We have jurisdiction pursuant to 28 U.S.C. § 1295(a)(4)(A) and 35 U.S.C. §§ 141(c), 319.

3 See Kamstrup A/S v. Axioma Metering UAB , 43 F.4th 1374, 1381 (Fed. Cir. 2022) (“We review the Board’sclaim constructions de novo and review any underlying factual determinations for substantial evidence.”). Case: 22-1398 Document: 81 Page: 3 Filed: 05/02/2024PACKET INTELLIGENCE LLC v. JUNIPER NETWORKS , INC

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evidence on which Packet would have us base a narrower construction – including statements following “for instance” and “some” in the specification – is exempl ary and not definitional. J.A. 1318 at 2:39

- 45. These statements do not justify limiting the scope of the “conversational flow” to specific network endpoints or a specific client or user. Based on the correct construction, substantial evidence supports the Board’s finding that prior art U.S. Patent No. 6,412,000 (“Riddle”) discloses the claimed “conversational flow.” 4 Exchanging packets “in any direction,” as permitted under th e Board’s construction, means that the challenged claims encompass bidirectional packet flows as well as unidirectional flows (in any direction). It is undisputed that Riddle discloses unidirectional flows. Additionally, the Board found that Riddle discloses bidirectional packet flows as well, see, e.g. , J.A. 39, and this finding is supported by substantial evidence, see, e.g. , J.A. 1910 at 13:54

- 59 (Riddle disclosing “flow that is used to exchange commands and responses”). Substantial evidence also supports the B oard’s finding that Riddle discloses the claimed state

- based analysis of “conversational flow.” During the IPR proceeding s, Packet contended that “Riddle relates to classifying traffic based on an individual packet in the flow, rather than on a state of the flow (i.e., evaluation across multiple packets).” J.A. 17353 ( internal emphasis omitted) . Relying on expert testimony and prior art disclosures, the Board found, however, that Riddle discloses classifying service aggregates based on a plurality of ind icators across multiple packets. See, e.g. , J.A. 1909 at 12:5 3- 57 (Riddle disclosing

4 See Intel Corp. v. PACT XPP Schweiz AG , 61 F.4th 1373, 1378 (Fed. Cir. 2023) (“What the prior art discloses and whether a person of ordinary skill would have been motivated to combine prior art references are both fact questions that we review for substantial evidence.”). Case: 22-1398 Document: 81 Page: 4 Filed: 05/02/2024PACKET INTELLIGENCE LLC v. JUNIPER NETWORKS , INC

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suppressing duplicate packets “in favor of keeping a count of the duplicates and a most recent time traffic with these identifying characteristics [that] was encountered” ); J.A. 1554 ¶ 357 (Dr. Weissman testifying that “with flows involving FTP applications, Riddle teaches performing stateoperations to determine if the flow belongs to a service aggregate”). T his is sufficient to allow us to affirm the Board’s findings.
T urning to Juniper’s cross

- appeal s , substantial evidence supports the Board’s finding that Juniper failed to show that prior art U.S. Patent No. 5,740,175 (“Wakeman”) discloses an associative cache. 5 Regardless, even assuming Wakeman discloses an associat ive cache, the Board’s finding that a person of ordinary skill in the art would not have been motivated to implement Wakeman’s content addressable memory (“CAM”) cache as an associative cache is supported by substantial evidence. See, e.g. , J.A. 176 78

- 79 ¶¶ 89- 90 (Ms. Quigley testifying “associative caches are not an obvious solution to all caching needs – they tend to be reserved for situations where the need for flexibility and performance exceeds the need for cost efficiency.

. . . Wakeman’s focus on b alancing cost and performance would not lead a POSITA to select an associative cache”).

5 Juniper directs our attention to a statement in U.S.Provisional Application No. 60/141,903, which was incorporated by reference in the ’646 and ’789 patents, explaining t hat “CAM is the same as associative storage.” J.A. 2680. Juniper did not present this contention to the Board, so we d o not consider it. See Acoustic Tech., Inc. v. Itron Networked Sols., Inc. , 949 F.3d 1360, 1364 (Fed. Cir. 2020). Case: 22-1398 Document: 81 Page: 5 Filed: 05/02/2024PACKET INTELLIGENCE LLC v. JUNIPER NETWORKS , INC

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We have considered the parties’ remaining arguments and find them unpersuasive. 6 Thus, for the foregoing reasons, we affirm the Board’s final written decisions.
AFFIR MED
C OSTS
No c osts.

6 Packet argues that former Commissioner Hirshfeld lacked authority to rule on its request s for Director review. We have rejected this argu ment in Arthrex, Inc. v. Smith & Nephew, Inc. , 35 F.4th 1328, 1335 (Fed. Cir. 2022)
, and must do so again here. Case: 22-1398 Document: 81 Page: 6 Filed: 05/02/2024