Flexiworld Technologies, Inc. v. Sony Corporation

Case Overview: Flexiworld Technologies, Inc. v. Sony Corporation (2:23-cv-00616, E.D. Tex.)

Parties and accused technology. Flexiworld Technologies, Inc. is a Washington-based patent monetization entity built around inventor William Ho Chang's early-2000s wireless-output research; the Stanford NPE Litigation Database classifies the company as a "Failed startup" asserting patents (npe.law.stanford.edu/patent/9042811), and its portfolio—spanning wireless printing, screen mirroring, and smart-TV connectivity—has been asserted in multiple E.D. Tex. cases (e.g., Flexiworld v. Hisense, 2:22-cv-00228). Sony Corporation, a Japanese consumer-electronics giant whose U.S. parent is Sony Group Corporation, was accused of infringing seven patents through a broad swath of its U.S. product lines: Bravia TVs running Google TV, HT-series soundbars and wireless speakers, LSPX projectors, LinkBuds/WF/WH-series headphones, PlayStation gaming consoles, Xperia smartphones, and TV remotes (RPX Insight complaint excerpt; PatSnap case page). Flexiworld alleged both direct infringement (35 U.S.C. § 271(a)) and induced infringement (§ 271(b)), citing an October 14, 2021 notice letter to Sony and seeking willfulness-enhanced damages.

Patents asserted. The seven asserted patents are all members of one sprawling continuation family claiming priority back to 2000–2002, and broadly cover wireless device discovery, pairing, and digital-content delivery to output devices: '596 (U.S. 10,162,596) — a portable device (e.g., smartphone) receiving voice-activated commands to wirelessly manage/drive an output device (asserted against Xperia phones and remotes); '259 (U.S. 9,836,259) — TVs/speakers/output controllers that join a Wi-Fi network using entered security info and download apps to receive streaming digital content (asserted against TVs, soundbars, consoles); '056 (U.S. 11,096,056) — output devices such as TVs/output controllers configured to wirelessly receive digital content from an Internet service or a same-network device (TVs, projectors); '516 (U.S. 9,798,516) — same wireless-output/connectivity family (exact title not verified in available sources); '811 (U.S. 9,042,811) — "specification of a smart wireless television for rendering digital content" (smart TVs); '871 (U.S. 10,768,871) — wireless output devices/controllers establishing wireless connectivity and receiving digital content (TVs, projectors, soundbars, consoles, headphones); and '903 (U.S. 11,029,903) — output systems (TV controllers, TVs, displays, audio devices) playing content received wirelessly either from an Internet content service or a same-network client (TVs, consoles). Essentially, the portfolio reads on modern smart-TV/streaming/screen-mirroring ecosystems such as Google TV, Chromecast/AirPlay-style casting, and wireless audio.

Procedural posture and significance. Filed December 19, 2023, in the Marshall Division of the Eastern District of Texas before Chief Judge Rodney Gilstrap, the case progressed through an amended complaint (Dkt. 16), Sony's answer (Dkt. 28), a protective order, and a docket control order setting a June 11, 2025 Markman hearing and December 8, 2025 trial—before the parties filed a Joint Stipulation to Dismiss with Prejudice under Rule 41(a)(1)(A)(ii) (Dkt. 42), which Judge Gilstrap accepted on May 29, 2025, with each side bearing its own costs and no merits ruling (PacerMonitor docket; PatSnap quoting the dismissal order). Venue was proper in E.D. Tex. because Sony, as a foreign corporation, may be sued in any judicial district under 28 U.S.C. § 1391(c)(3)—the complaint pleads exactly that, alongside agency/jurisdiction theories tied to Sony's U.S. subsidiaries (SCA, SEI, SIE) and distribution into the district. The case is notable as part of Flexiworld's NPE campaign targeting consumer-electronics manufacturers over early-2000s wireless-output patents in the historically patent-plaintiff-friendly Marshall forum; the with-prejudice dismissal bars re-assertion against Sony of these specific claims, but—because there was no validity ruling and the dismissal covers only this dispute—the seven patents remain enforceable against other defendants (PatSnap). I found no well-sourced record in the available materials of PTAB IPRs against these patents in connection with this case, and the settlement's financial terms were not disclosed; Flexiworld's counsel was Nelson Bumgardner Conroy PC (Grochocinski, Ginnings, Westmoreland), while Sony was represented by Wolf Greenfield & Sacks and The Dacus Firm (Rader, Steenburg, Xiang, McKiernan, Dacus, Hrycyszyn).

I'll research the key legal developments in this case, starting with the docket and filings.

Let me dig deeper into the docket entries between the answer and dismissal, and check for any counterclaims and PTAB proceedings.

Let me look at the full docket history on PacerMonitor and check for PTAB proceedings against these patents.

Based on my research, here is the chronological summary of key legal developments and the outcome in Flexiworld Technologies, Inc. v. Sony Corporation, No. 2:23-cv-00616 (E.D. Tex. Marshall Div.).

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Chronology of Key Legal Developments & Outcome

1. Filing & Initial Pleadings

• 2023-12-19 — Complaint filed (Dkt. 1). Flexiworld Technologies, Inc. filed its original complaint for patent infringement against Sony Corporation before Chief Judge Rodney Gilstrap, asserting seven patents (U.S. Patent Nos. 10,162,596; 9,836,259; 11,096,056; 9,798,516; 9,042,811; 10,768,871; 11,029,903) and pleading direct infringement (§ 271(a)) and induced infringement (§ 271(b)), with a willfulness enhancement theory based on an October 14, 2021 notice letter (PacerMonitor docket; RPX Insight complaint excerpt). Venue was premised on 28 U.S.C. § 1391(c)(3) (foreign corporation suable in any district), with agency/jurisdiction allegations tied to Sony's U.S. subsidiaries SCA, SEI, and SIE.
• 2024-01-17 — Service on Sony. Summons returned executed (PacerMonitor docket).
• 2024-02-21 — Extension granted (Dkt. 14). The court granted a joint/unopposed extension of time for Sony to answer the amended complaint, serve infringement/invalidity contentions, and serve initial disclosures (Law360 docket notice).
• 2024-06-06 — First Amended Complaint (Dkt. 16). Flexiworld filed its First Amended Complaint, attaching the asserted patents as exhibits (PacerMonitor docket).
• 2024-07-19 — Answer (Dkt. 28). Sony answered the amended complaint (filed by Michael Rader of Wolf Greenfield & Sacks). The dismissal stipulation's reference to "all pending claims and counterclaims" (Dkt. 42) confirms Sony had asserted counterclaims (presumptively declaratory-judgment invalidity/non-infringement) in the answer, though I could not independently verify the counterclaim text from the available docket excerpts (PacerMonitor; PatSnap quoting Dkt. 42 order).
• 2024-06-12 through 2024-07-09 — Counsel appearances. Sony's Wolf Greenfield team appeared pro hac vice (Michael Rader, Charles Steenburg, Jie Xiang — Dkts. 19–21), and Deron Dacus (The Dacus Firm) was designated lead attorney in charge (Dkt. 27). Sony's Rule 7.1 disclosure identified Sony Group Corporation as corporate parent.

2. Pre-Trial Motions of Substance

• No motions to dismiss, transfer, or stay pending IPR were identified in the available docket record. Sony answered on the merits rather than challenging venue/personal jurisdiction (consistent with the complaint's § 1391(c)(3) foreign-defendant venue theory).
• The only substantive motions were joint, agreed scheduling/administrative motions: entry of an agreed discovery order (Dkt. 18, 2024-06-12), entry of an agreed docket control order (Dkt. 23, 2024-06-18), and entry of a stipulated protective order (Dkt. 24, 2024-06-20) — all granted. No party filed dispositive or summary-judgment motions before dismissal.
• Caveat: I could not confirm the content of every docket entry in the Dkt. 29–41 range from the sources available; the record between the answer (July 2024) and the May 2025 stipulation appears to have been contentions/expert-discovery-phase activity, but that is inference from the docket summary rather than verified entry-by-entry detail.

3. Claim Construction (Markman)

• 2024-06-20/21 — Docket Control Order (Dkt. 25). Set a Markman hearing for 2025-06-11 before Judge Gilstrap.
• No Markman ruling was ever issued. The case was dismissed with prejudice on 2025-05-29, thirteen days before the scheduled hearing, so the case never reached claim construction. No claim-construction opinion or order exists.

4. Discovery Milestones with Strategic Significance

• 2024-06-17 — Agreed Discovery Order (Dkt. 22). Entered by Judge Gilstrap, governing the discovery schedule.
• 2024-06-21 — Stipulated Protective Order (Dkt. 26). Entered, indicating the parties anticipated producing sensitive technical/commercial information (source code, sales data) from Sony's broad accused product lines (Bravia TVs, HT soundbars, LSPX projectors, LinkBuds/WF/WH headphones, PlayStation consoles, Xperia phones, remotes).
• The Docket Control Order (Dkt. 25) set pretrial conference for 2025-11-03 and jury selection/trial for 2025-12-08, and the 2024-02-21 extension (Dkt. 14) covered infringement/invalidity contentions and initial disclosures — the standard E.D. Tex. P.R. 4-3/4-4 exchange. No discovery disputes, motions to compel, or sanctions motions appear in the available docket record, suggesting cooperative discovery through the agreed deadlines.

5. Trial Events, Verdict, and Post-Trial Motions

• No trial occurred. The case was dismissed before the scheduled 2025-12-08 jury selection / trial.
• No verdict, no JMOL, no new-trial motion, no § 285 fee motion. Because the dismissal order expressly provided that each party bears its own costs, expenses, and attorneys' fees, no post-judgment fee request was available (PatSnap analysis).

6. Settlement, Dismissal, Judgment, and Appeal — Final Disposition

• 2025-05-29 — Dismissal with Prejudice (Dkt. 42; case terminated). The parties filed a Joint Stipulation to Dismiss with Prejudice under Fed. R. Civ. P. 41(a)(1)(A)(ii) covering "all pending claims and counterclaims." Judge Gilstrap's order "ACKNOWLEDGES AND ACCEPTS" the dismissal, directs the Clerk to CLOSE the case, and provides that "[t]he Parties shall bear their own costs, expenses, and attorneys' fees" (PatSnap, quoting the PACER order verbatim).
• No merits ruling was issued — no validity, infringement, or claim-construction determination. The seven patents emerged legally unimpaired and remain enforceable against other defendants (indeed, Flexiworld's parallel campaign against Hisense over overlapping patents was ongoing in the same district).
• No appeal was filed (the disposition is a stipulated dismissal, not an appealable merits judgment; the docket shows no notice of appeal).
• Settlement terms undisclosed. The public record does not confirm whether a license or covenant-not-to-sue accompanied the dismissal; the cost-neutral, with-prejudice stipulation is structurally consistent with a negotiated resolution, but no terms were filed (PatSnap confirms non-disclosure).

7. Parallel PTAB IPR/PGR Proceedings

• None identified. I found no well-sourced record of any IPR or PGR petition filed at the USPTO PTAB against any of the seven asserted patents (10,162,596; 9,836,259; 11,096,056; 9,798,516; 9,042,811; 10,768,871; 11,029,903) in connection with this case, whether by Sony or third parties. Stanford's NPE Litigation Database lists only the district-court case for these patents, and no PTAB institution decisions surfaced in searches. Consequently, there was no stay pending IPR and no PTAB estoppel or validity ruling affecting the litigation.

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Bottom Line

This was a settlement-driven, merits-free disposition: a 527-day case (2023-12-19 → 2025-05-29) that advanced through pleadings, contentions, discovery orders, and scheduling into the pre-Markman phase, then ended by joint stipulation of dismissal with prejudice thirteen days before the scheduled claim-construction hearing — with no claim construction, no dispositive motions, no trial, no verdict, no fee award, no appeal, and no parallel PTAB proceedings. The dismissal bars re-litigation of these claims against Sony but leaves the Flexiworld portfolio intact against other targets.

I'll research press coverage of this case from multiple angles.

Let me search for more specific news coverage and verify the listed IPWatchdog articles.

Let me verify the specific IPWatchdog articles and search for mainstream/legal trade coverage.

Press and analysis coverage of Flexiworld v. Sony: essentially none

I could not find any dedicated news or analysis article about Flexiworld Technologies, Inc. v. Sony Corporation, No. 2:23-cv-00616, from Reuters, Bloomberg Law, Law360, Ars Technica, The Verge, IPWatchdog, Patently‑O, JD Supra, or any trade or mainstream outlet. The only on‑point materials are litigation‑database and docket‑aggregator entries: PatSnap (a litigation‑analytics blog that quotes the Dkt. 42 dismissal order verbatim and characterizes the seven patents as emerging "legally unimpaired"), RPX Insight (which hosts the complaint and claim charts rather than reporting), PacerMonitor, and the Stanford NPE Litigation Database. Law360 carries the case only as a docket line in its Sony Corp. company tracker ("February 21, 2024 Flexiworld Technologies, Inc. v. Sony Corporation | Patent | Texas Eastern") — not as a reported story. This is consistent with the case's profile: a routine NPE complaint against a foreign defendant in Marshall that settled out by stipulated dismissal roughly thirteen days before the Markman hearing, with no merits ruling and no disclosed settlement terms, which is the kind of docket entry that goes uncovered.

A flag on the supplied article list. None of the six IPWatchdog pieces given in the prompt can actually be "about this case." The latest, "Patent Filings Roundup: Slow Board Week…" (2023‑04‑26), predates the 2023‑12‑19 complaint by nearly eight months; the remainder are 2020–2021. Within my search budget I could not verify that any of them mentions Flexiworld or Sony at all, and I would treat the premise that they are coverage of this litigation as unconfirmed (and unlikely). The closest thing I found to roundup coverage of Flexiworld is a different IPWatchdog roundup, "Patent Filings Roundup: Samsung Seeks Declaratory Judgment…", which lists "Flexiworld Technologies, Inc. … Roku, Inc. … 11096056" — i.e., Flexiworld's Roku suit over the same '056 patent asserted against Sony, not the Sony case.

What the record shows instead (no press required). The substantive Flexiworld v. Sony story is entirely in court/PTAB documents, not journalism. The complaint, available via RPX Insight, alleges § 271(a)/(b) infringement and willfulness based on an October 14, 2021 notice letter, and seeks "at least a reasonable royalty" plus enhanced damages under § 284 and fees under § 285 — no damages figure is pleaded, and no outlet has reported one. There is likewise no reported settlement number; the parties stipulated to bear their own costs, and terms were not filed.

Contradiction with the earlier-generated section — PTAB activity. The prior "Key legal developments" section states that "no IPR or PGR petition" was ever filed against these patents and that "no PTAB institution decisions surfaced." Search results contradict that. Flexiworld's own briefs and PTAB records show Roku filed petitions against two of the very patents asserted against Sony: IPR2022‑01113 against the '811 patent and a PGR against the '903 patent (PGR2021‑00112), plus IPR2022‑01112 ('073) and IPR2022‑01114 ('233), all terminated before institution by an October 2022 settlement and patent‑license agreement; the '259 patent was also asserted against Roku. Separately, a PTAB filing concerning the '903 patent argues the '903 output‑system claims are written‑description‑deficient in the manner of Rivera, and states "the Petition explained, and the Board agreed" — indicating at least one instituted proceeding bearing on a Sony‑asserted patent, though I could not, within my search limits, pin down that proceeding's number or final outcome, so I flag it as unverified rather than assert it. This is a material correction to the earlier section: there was PTAB activity against patents in this suit (through earlier Roku and Lexmark challenges), even though Sony itself filed none in this case and none produced a merits ruling on these seven patents.

Bottom line: for a 2‑ to 4‑paragraph "what the press said" deliverable, the honest answer is that the press said essentially nothing — and the supplied IPWatchdog links are not coverage of this case.

Sources

• Flexiworld Technologies v. Sony Corp. — Wireless Output & Smart Device Patents | PatSnap - Your Agentic AI Partner
• 125. Exemplary claim charts demonstrating Sony's infringement of the '259 Patent, as well as Sony's customers' infringement of t...
• IN THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF TEXAS MARSHALL DIVISION
• Flexiworld Technologies, Inc.
• 10489096 | NPE Litigation Database
• Sony Corp. (NYSE:SONY) : Dockets :: Law360
• 2:23-cv-00616 | Flexiworld Technologies, Inc. v. Sony Corporation | RPX Empower
• AO 120 (Rev
• ideas in the public"—specifically a policy against restricting attacks on patent validity
• Flexiworld Technologies v. Sony Corp. — Wireless Output & Smart Device Patents | PatSnap - Your Agentic AI Partner
• 10846031 | NPE Litigation Database
• The only evidence in the '413 application that Flexiworld cites for support is a statement describing Figure 1 as depicting "per...

Plaintiff's Counsel of Record — Flexiworld Technologies, Inc. v. Sony Corporation (2:23-cv-00616, E.D. Tex.)

Based on the docket (PacerMonitor case page for 2:23-cv-00616), the complaint and amended complaint filings, and PTAB records, Flexiworld was represented exclusively by Nelson Bumgardner Conroy P.C., with three attorneys of record:

1. Timothy E. Grochocinski — Lead Counsel

• Role: Lead plaintiff's counsel; he signed the original Complaint (Dkt. 1, filed 12/19/2023) and the First Amended Complaint (Dkt. 16) for Flexiworld, and is the attorney whose name appears on the operative pleadings (PacerMonitor docket: "FIRST AMENDED COMPLAINT … filed by Flexiworld Technologies, Inc..(Grochocinski, Timothy)").
• Firm: Nelson Bumgardner Conroy P.C. — firm offices at 745 McClintock Drive, Suite 340, Burr Ridge, IL 60527; 3131 W. 7th Street, Suite 300, Fort Worth, TX 76107; and 15020 S. Ravinia Ave., Suite 29, Orland Park, IL 60462. Martindale-Hubbell lists him as a Senior Partner at the firm's Fort Worth location; docket/PTAB filings most often carry the Burr Ridge, IL address. Email: tim@nelbum.com.
• Experience: Long-running patent-litigation partner focused on patent infringement for NPE/technology clients; regularly appears as lead counsel in E.D. Tex. and W.D. Tex. cases (e.g., Unification Technologies v. Micron, 6:20-cv-00500-ADA; Stellar v. Motorola Solutions, 4:23-cv-750; and, most recently, Perceptive Automata v. Tesla, 7:25-cv-00594, and Malikie Innovations v. Toyota, 2:26-cv-00469), and in PTAB IPRs, including Flexiworld's own IPRs (e.g., IPR2023-00845/846).

2. Charles Austin Ginnings — Counsel of Record (of counsel / PTAB lead)

• Role: Filed a Notice of Attorney Appearance for Flexiworld in this case (PacerMonitor docket: "NOTICE of Attorney Appearance by Charles Austin Ginnings on behalf of Flexiworld Technologies, Inc."). USPTO Reg. No. 62,706.
• Firm: Nelson Bumgardner Conroy P.C. — Burr Ridge, IL office (745 McClintock Road, Suite 340); formerly the firm's Orland Park, IL office. Email: austin@nelbum.com.
• Experience: Patent litigator and PTAB practitioner who has served as lead counsel for Flexiworld in its IPR defenses (e.g., Unified Patents v. Flexiworld, IPR2022-00775, where he substituted in as lead counsel; IPR2023-00845/846 for Flexiworld patents against Lexmark). Also appears in E.D. Tex. NPE cases such as Perceptive Automata v. Tesla and Malikie v. Hyundai.

3. Janson Westmoreland — Local/Texas Counsel of Record

• Role: Filed a Notice of Attorney Appearance for Flexiworld in this case (PacerMonitor docket: "NOTICE of Attorney Appearance by Janson Westmoreland on behalf of Flexiworld Technologies, Inc."). Texas-licensed and USPTO-registered; he is the only plaintiff-side attorney of record clearly based in the firm's Fort Worth, TX office (3131 W. 7th Street, Suite 300), giving him a natural local-counsel function for the E.D. Tex. (Marshall) action.
• Firm: Nelson Bumgardner Conroy P.C., Fort Worth, TX 76107.
• Experience: Junior intellectual-property attorney (Texas A&M School of Law, JD 2022; licensed in TX and before the USPTO per U.S. News/attorney directory); supports the firm's patent-litigation docket.

Notes on roles and sourcing

• No separate local counsel or in-house counsel of record: The docket shows only the three Nelson Bumgardner attorneys appearing for Flexiworld. Notably, the pro hac vice notices on the docket are all on Sony's side (Steenburg and Rader for Wolf Greenfield), which suggests the plaintiff-side attorneys were already admitted in E.D. Tex. (or that no PHV filings were required); I could not verify the admission status from the publicly available docket excerpts.
• Brent N. Bumgardner (firm name partner, Fort Worth) represents Flexiworld in related IPRs and other cases (e.g., Malikie v. Hyundai), but I found no docket evidence that he appeared in this specific Sony case, so he is not listed as counsel of record here.
• The settlement/dismissal (Dkt. 42, accepted 5/29/2025) resolved the case without a merits ruling, so there was no court opinion identifying counsel beyond the appearance docket.
• Sourcing: PacerMonitor public docket for 2:23-cv-00616; PatSnap litigation page (identifying the same three attorneys and firm); PTAB filings (IPR2023-00845/846 powers of attorney; IPR2022-00775 mandatory notices); Martindale-Hubbell and U.S. News attorney profiles for office locations and credentials.

Counsel of Record — Defendant Sony Corporation

Based on the public PACER docket (via PacerMonitor, case 2:23-cv-00616), the PatSnap case page, and the RPX Insight complaint copy, Sony Corporation appeared through two firms: Wolf Greenfield & Sacks, P.C. (out-of-state/lead) and The Dacus Firm, PC (Texas local counsel). Six attorneys of record appear in the docket. I found no in-house Sony counsel of record on the public docket.

Out-of-state counsel — Wolf Greenfield & Sacks, P.C. (Boston, MA), admitted pro hac vice

1. Michael Rader — Lead Wolf Greenfield attorney / pro hac vice (Dkt. 19, filed June 12, 2024). He signed Sony's Answer to the First Amended Complaint (Dkt. 28, filed July 2024), indicating he was the lead drafting attorney on Sony's substantive pleadings. Patent litigator at Wolf Greenfield's Boston office with an active E.D. Tex. practice; he has handled multiple patent cases before Judge Gilstrap (notable prior matters not independently verified in this search).
2. Charles T. Steenburg — Pro hac vice (Dkt. 20, filed June 12, 2024). Wolf Greenfield & Sacks, P.C. (Boston). Listed by PatSnap as Sony counsel; an IP litigator focused on patent disputes for technology clients.
3. Jie Xiang — Pro hac vice (Dkt. 21, filed June 12, 2024). Wolf Greenfield & Sacks, P.C. (Boston). Listed by PatSnap as Sony counsel.

Local counsel — The Dacus Firm, PC (Tyler/Marshall, Texas)

1. Deron R. Dacus — Local counsel and designated Attorney in Charge for Sony. Appeared by notice of appearance (Dkt. 9, filed Feb. 21, 2024) and was formally designated attorney in charge on Sony's behalf (Dkt. 27, filed July 9, 2024). Founding member of The Dacus Firm, PC (Tyler, TX; handles matters throughout the Eastern District of Texas). A well-known E.D. Tex. patent litigator who regularly serves as local counsel for foreign and out-of-state defendants in Marshall/Tyler patent cases.
2. Gerald Bill Hrycyszyn — Local counsel, The Dacus Firm, PC. Appeared for Sony early in the case; he filed Sony's agreed motion for extension of time to answer (which included a waiver of foreign service requirements) before Sony's answer was due. Listed by PatSnap as Sony counsel.
3. Marie A. McKiernan — Local counsel, The Dacus Firm, PC. Listed by PatSnap as Sony counsel for this case (no separate docket entry text surfaced in my search, but she is corroborated by PatSnap's counsel table).

Sourcing and caveats

• The pro hac vice appearances (Dkts. 19–21), Dacus's appearance (Dkt. 9) and attorney-in-charge designation (Dkt. 27), and Rader's signature on the Answer (Dkt. 28) are directly confirmed by the PacerMonitor docket text. Hrycyszyn's appearance is confirmed by the docket text of Sony's agreed extension motion. McKiernan's role rests on PatSnap's counsel listing rather than a docket entry I could retrieve, so treat her as "listed counsel" rather than a docket-verified filer.
• The docket contains no separate "lead counsel" designation for Wolf Greenfield; Dacus is the only formally designated attorney in charge, and Rader appears to be the lead Wolf Greenfield attorney based on his signature on the Answer.
• No merits ruling was issued; the case was dismissed with prejudice by joint stipulation (Dkt. 42) on May 29, 2025, so no further appearances were made.