XR Communications, LLC d/b/a Vivato Technologies v. Extreme Networks, Inc.

I'll research this case systematically across the docket, PTAB, and trade press.

Case Overview

The parties. Plaintiff‑appellant XR Communications, LLC, doing business as Vivato Technologies, is a patent‑holding entity, not an operating Wi‑Fi vendor. Its own complaints describe it as a Delaware LLC with a principal place of business at 2809 Ocean Front Walk, Venice, California, and the sole owner by assignment of the asserted patents (complaint, XR Commc'ns v. Belkin, C.D. Cal. No. 2:21‑cv‑04914, ¶10). The "Vivato" name is borrowed from Vivato, Inc., a company founded in 2000 as an "$80+ million venture‑backed" startup that built extended‑range Wi‑Fi base stations using beamforming phased‑array antennas; its named innovators included Siavash Alamouti, Ken Biba, William Crilly, James Brennan, Edward Casas, and Vahid Tarokh (id. ¶¶11–15). Vivato, Inc. did not survive as an operating business — defendants' claim‑construction brief describes XR as "adopting the name of Vivato, Inc., a failed wireless technology company" (Defs.' Opening CC Br., Ex. 1013 in IPR2018‑00762) — and Stanford's NPE Litigation Database classifies XR under the asserter category "failed startup." XR is represented by Russ August & Kabat (Marc A. Fenster, Reza Mirzaie, Brian D. Ledahl, Minna Chan, James Pickens). Defendant‑appellee Extreme Networks, Inc. is a publicly traded (NASDAQ: EXTR) enterprise networking company based in San Jose, California, selling wired/wireless switching, Wi‑Fi access points, and cloud network management; it was represented on appeal by Ropes & Gray LLP (Daniel W. Richards, Andrew N. Thomases) (Fed. Cir. op., 22‑1785 et al.). The Extreme suit was one of roughly ten parallel actions XR filed in April 2017 against Wi‑Fi equipment makers, including Cisco, Aruba, Ruckus, Netgear, D‑Link, Belkin, ASUS, Ubiquiti, and Xirrus, asserting 29 claims across the three patents (Defs.' CC Br.).

The technology and the patents. The accused instrumentalities were Extreme's 802.11ac (Wi‑Fi 5, Wave 2) access points supporting multi‑user MIMO — specifically models including the ExtremeWireless AP3912, AP3916, AP3935, and AP3965 and the WiNG AP8533 and AP8432 ([complaint summary, *XR Comm

I'll research this systematically — docket, PTAB, and press coverage.

Key Legal Developments & Outcome — XR Communications, LLC v. Extreme Networks, Inc., No. 22‑1790 (Fed. Cir.)

Bottom line: XR lost on every theory without ever reaching trial in the Extreme case. The two beam‑switching patents (’296, ’728) were killed claim‑by‑claim at the PTAB in 2019; the third (’231) was held indefinite in N.D. Cal. and the C.D. Cal. court gave that ruling collateral‑estoppel effect on 2022‑01‑04; final judgment for Extreme issued 2022‑04‑15; and the Federal Circuit affirmed 2023‑05‑18 in a two‑paragraph, nonprecedential per curiam opinion. Mandate issued 2023‑06‑30.

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1. Filing and initial pleadings (2017)

2. Pre‑trial motions: claim construction begins, then everything stops for the PTAB

• The C.D. Cal. cases were coordinated for joint claim construction. XR and the Wi‑Fi defendants served a Joint Claim Construction and Prehearing Statement (Dkt. 83‑1, 2018‑02‑09) and exchanged proposed constructions — this document was later used as an exhibit in the IPRs (Ex. 1014 in IPR2018‑00725).
• 2018‑05‑22 — Order re Stay of All Consolidated Cases (Judge Guilford): the C.D. Cal. actions were stayed in their entirety pending the inter partes reviews (CourtListener docket entry). No Markman ruling on the ’296/’728/’231 claims issued in the Extreme action itself — that proved decisive, because the dispositive claim construction came from a different court (N.D. Cal.) two years later.
• The individual suits were consolidated into a lead case, XR Commc'ns v. D‑Link Systems, No. 8:17‑cv‑00596‑DOC‑JDE (C.D. Cal.), before Judge David O. Carter, and the Extreme action was re‑docketed as 2:17‑cv‑02953‑DOC (the final judgment carries both the -AG-JCG PACER suffix and the -DOC judicial caption). The exact reassignment/consolidation order date is not visible in the public RECAP excerpts I could retrieve — flag this as a sourcing gap.
• No motion to dismiss, transfer, or § 1404 motion by Extreme is reflected in the public docket; the strategic motion was the stay, and it succeeded.

3. The parallel PTAB proceedings — the case‑dispositive thread

Eleven petitions were filed against the three patents in 2018 by Aruba/HPE, Cisco, and the Ruckus/ARRIS/Netgear/Belkin group. Outcome by patent:

’231 — XR survived (temporarily):

• IPR2018‑00762 (Cisco, filed 2018‑03‑15; instituted 2018‑09‑19 on claims 1–9, 12; FWD 2019‑08‑27) — Board construed “cross‑correlated signal information that is received by said receiver” as requiring cross‑correlation before receipt, and held Cisco failed to prove obviousness over Agee.
• IPR2018‑00701 (Aruba) and IPR2018‑01016 (Ruckus group) — institution denied.
• Fed. Cir. No. 20‑1105, Cisco Systems, Inc. v. XR Communications, LLC, decided 2020‑11‑25 — affirmed the Board on the claim‑construction issue (plain meaning of the past‑participial “cross‑correlated … that is received”; claims 20 and 52 confirm the distinction) (opinion). This was XR's only PTAB win.

’296 and ’728 — all asserted claims cancelled:

• ’296: IPR2018‑00725 (Aruba, filed 2018‑03‑01; FWD Sept. 2019, Paper 42, 57 pp.); IPR2018‑00764 (Cisco, filed 2018‑03‑15, instituted 2018‑09‑17; FWD 2019‑09‑16, Paper 46, 86 pp.); IPR2018‑01017 (Ruckus/ARRIS/Netgear/Belkin; FWD 2019‑10‑10 — “Determining All Challenged Claims Unpatentable, Denying Patent Owner's Motion to Amend”).
• ’728: IPR2018‑00726 (Aruba), IPR2018‑00763 (Cisco), IPR2018‑01018 (Ruckus group) — all challenged claims held unpatentable in the same Sept.–Oct. 2019 window.
• Substantive basis: Hovers in view of Jetzek (hard hand‑off/“active set” beam switching), plus the applicants' own acquiescence during prosecution of the ’728 continuation that Hovers disclosed most limitations. XR's motion to amend was denied in IPR2018‑01017.
• Effect: per the final judgment, all asserted ’296/’728 claims were “cancelled by the U.S. Patent Office pursuant to Final Written Decisions” — i.e., certificates of cancellation issued, which implies no pending appeal survived. I could not independently confirm whether XR appealed any ’296/’728 FWD and lost, or simply did not appeal; treat as unverified.

4. The N.D. Cal. case

I'll research counsel of record for XR Communications in this appeal and the underlying district court case.

Let me pull the Federal Circuit docket details and the underlying district court record.

Let me verify the full Federal Circuit docket entries and identify Robert Gajarsa's role.

Counsel of Record for Plaintiff‑Appellant XR Communications, LLC d/b/a Vivato Technologies

Bottom line: XR was represented at the Federal Circuit exclusively by Russ August & Kabat LLP of Los Angeles — a six‑attorney appearance filed in 22‑1790 (and refiled in the consolidated lead appeal), with Marc A. Fenster as principal/lead appellate counsel and Reza Mirzaie as the attorney who actually filed nearly every substantive paper. No in‑house counsel and no separate appellate or local‑counsel firm ever appeared for XR. The same RAK team had been XR's counsel of record in the underlying C.D. Cal. action since 2017.

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A. Federal Circuit — Appeal No. 22‑1790 (consolidated into No. 22‑1785, lead)

Docket trail (22‑1790): appeal docketed May 13, 2022; consolidated by order of May 23, 2022 with 22‑1785, 22‑1787, 22‑1789, 22‑1791, 22‑1792, with instructions that "the parties must file all documents in the lead appeal only" (Dkt. 2–3) — which is why 22‑1790's own docket is nearly empty. Entry of appearance was first submitted June 15, 2022, rejected as non‑compliant (Dkt. 7), and re‑filed June 17, 2022 (Dkt. 6 in 22‑1790; Dkt. 18 in 22‑1785) (UniCourt 22‑1790 docket; Patexia 22‑1785 documents).

Practical note: XR moved to waive oral argument (Dkt. 30, Nov. 28, 2022), consistent with the case being resolved on the papers via collateral estoppel from the companion appeal; the May 18, 2023 opinion (Prost, Reyna, Stark, JJ.) lists Fenster as arguing/appearance counsel per the court's standard convention. I did not locate the order granting the waiver in the sources searched.

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B. District court — XR Communications v. Extreme Networks, 2:17‑cv‑02953‑AG‑JCG (C.D. Cal.) (the judgment appealed from)

Counsel of record for XR, all at Russ August & Kabat, 12424 Wilshire Blvd., 12th Floor, Los Angeles, CA 90025, (310) 826‑7474:

• Marc A. Fenster (SBN 181067) — lead counsel; filed the Notice of Change of Lead Counsel on April 26, 2017 (Dkt. 12).
• Reza Mirzaie (SBN 246953) — partner.
• Philip X. Wang (SBN 262239) — registered patent attorney (Reg. No. 74,621); separately served as lead counsel in the PTAB IPRs on the '296/'728 patents (e.g., Updated Mandatory Notices, IPR2019‑00209, May 4, 2023), with Mirzaie and Christian Conkle as backup. He appears on the district‑court docket but is not listed on the Federal Circuit appearance.
• Christian W. Conkle (SBN 306374) — district‑court counsel of record; also PTAB backup counsel.
• James N. Pickens (SBN 307474) — district‑court counsel of record and appellate counsel.
• Kent N. Shum — appeared for XR in the district court and on related XR dismissals (e.g., Dkt. 36, No. 5:17‑cv‑00744).

Sources: CourtListener parties/attorneys, No. 2:17‑cv‑02953; Final Judgment, Dkt. 48 (Apr. 15, 2022); Patexia docket.

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C. Gaps, caveats, and a cross‑check against the existing summary

• No in‑house counsel appeared. XR is a non‑practicing entity with no salaried legal department on the docket; all appearances are RAK. RAK used a case‑specific service address, rak_vivato@raklaw.com, in the PTAB matters.
• Nothing sealed as to counsel — every appearance in 22‑1790 and 2:17‑cv‑02953 is public; the sealed material in this family was the Newo settlement agreement, not the representation.
• Robert Gajarsa's firm is unverified. He appears on the June 17, 2022 appearance and withdrew four months later; treat his affiliation as an open item rather than assuming RAK.
• Consistency check: the metadata and prior summary are consistent with the record. 22‑1790 is the Extreme member of the six consolidated appeals led by 22‑1785 (D‑Link); the judgment appealed from is the C.D. Cal. Final Judgment of April 15, 2022 (Dkt. 48), and affirmance on May 18, 2023 rested entirely on the companion N.D. Cal. indefiniteness affirmance. One refinement to the earlier summary: the prior section's list of RAK attorneys (Fenster, Mirzaie, Ledahl, Chan, Pickens) is accurate but incomplete — it omits Gajarsa (appeared, then withdrew) and Philip X. Wang / Christian Conkle, who were district‑court counsel of record but not on the Federal Circuit appearance.
• Opposing side (for contrast only): Extreme was represented by Daniel W. Richards and Andrew N. Thomases, Ropes & Gray LLP, East Palo Alto, CA; in the district court Extreme's counsel included Dykema Gossett (Craig N. Hentschel, Abirami Gnanadesigan, Allan Gabriel) and Matthew J. Rizzolo pro hac vice.

I'll research counsel of record for Extreme Networks in both the Federal Circuit appeal and the underlying district court action.

Counsel of Record — Extreme Networks, Inc.

Bottom line: Extreme's defense was handled by Ropes & Gray LLP (Silicon Valley/East Palo Alto, with a Washington, D.C. litigator admitted pro hac vice) for the substantive patent work, with Dykema Gossett LLP (Los Angeles) serving as local counsel of record in the C.D. Cal. action. On appeal in No. 22‑1790 (consolidated into No. 22‑1785), only two attorneys entered appearances for Extreme: Daniel W. Richards and Andrew N. Thomases, both of Ropes & Gray's East Palo Alto office.

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1. Federal Circuit — No. 22‑1790 (consolidated into No. 22‑1785)

• Entry of appearance: Doc. 7, May 27, 2022 — "Entry of appearance for Daniel W. Richards; Andrew Thomases as counsel for Appellee Extreme Networks, Inc." (Patexia docket for No. 22‑1785; see also UniCourt docket for No. 22‑1790, listing Andrew N. Thomases as the appellee attorney).
• Counsel block as printed in the opinion: "DANIEL W. RICHARDS, Ropes & Gray LLP, East Palo Alto, CA, for defendant-appellee Extreme Networks, Inc. Also represented by ANDREW N. THOMASES." (XR Commc'ns, LLC v. D-Link Sys., Nos. 22‑1785 et al., slip op. at 2 (Fed. Cir. May 18, 2023); CourtListener).
• The six appeals were consolidated by order entered in May 2022 (UniCourt docket, supra, entry "(#2) ORDER consolidating appeals 22‑1785, 22‑1787, 22‑1789, 22‑1790, 22‑1791, and 22‑1792").

Flag — originating case number. A secondary analytics page lists No. 22‑1790's originating district case as 2:17‑cv‑02948 (ex parte litigation page). That is wrong or at least imprecise: 2:17‑cv‑02948 is XR Communications v. ASUS Computer International (RPX). The Extreme action was 2:17‑cv‑02953‑AG‑JCG, which was consolidated into the C.D. Cal. lead case, 8:17‑cv‑00596‑DOC‑JDE (XR Commc'ns v. D-Link Sys., Judge David O. Carter). The Federal Circuit opinion's jurisdictional paragraph lists 2:17‑cv‑02948, ‑02951, ‑02953 and 8:17‑cv‑00596 collectively because the appeals were consolidated, not because each appeal maps one-to-one.

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2. District court — XR Commc'ns v. Extreme Networks, No. 2:17‑cv‑02953‑AG‑JCG (C.D. Cal., Judge Andrew J. Guilford; Mag. J. Jay C. Gandhi)