Jason S. Charkow

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Jason S. Charkow — patent litigation practice summary

Mr. Charkow's tracked practice centers on electronics and printing-technology patents, with a strong concentration in inkjet printer hardware and RF/wireless communications. The Slingshot Printing matters (W.D. Tex., Judge Albright) involved inkjet printhead and heater-chip patents (e.g., U.S. Patent Nos. 7,014,299; 7,594,708; 7,484,823), while the ParkerVision matters concerned RF receiver and signal-processing patents litigated in the Western District of Texas against Realtek, MediaTek, Texas Instruments, NXP, and TCL. His corporate-side background also references litigation over telecommunications networks, set-top boxes, content delivery networks, and internet technologies, consistent with the telecom/electronics profile in the docket record.

Side preference. The structured counts (4 plaintiff-side, 7 defendant-side) are somewhat misleading because the labels capture PTAB posture as well as district-court posture. In substance, the verifiable filings show him acting predominantly for patent owners and patent-enforcement plaintiffs — Slingshot Printing, ParkerVision, and Dynamic Mesh Networks — appearing as plaintiff in district court and as patent owner (styled the respondent/"defendant") in the corresponding IPRs. The "defendant" entries in the tracked list largely reflect those Patent Owner-side IPR proceedings, plus one instance where he appeared for third-party, non-party witnesses in ParkerVision v. Realtek. I found no well-sourced record of him as regular defense counsel for operating companies.

Firm context and PTAB experience. He is currently a partner at Daignault Iyer LLP (Vienna, VA), a boutique whose docket is dominated by patent-owner enforcement work. He previously practiced patent litigation at Goldberg Segalla LLP (New York), where the Slingshot and ParkerVision engagements were handled; the same core team (with Chandran Iyer and Richard Juang) appears to have moved to Daignault Iyer, and the same matters followed. Earlier positions include in-house roles at FORM Holdings Corp. (later XWELL, Inc.), where he was Senior Vice President, Legal and Business Affairs and General Counsel, and, before that, attorney roles at Winston & Strawn and Jones Day (per his corporate biography; the Jones Day reference is sourced only to that bio). He appears regularly before the PTAB, serving as lead or backup counsel in numerous IPRs — including HP's challenges to Slingshot's patents (IPR2020-01085, -01086), the Intel IPR against ParkerVision (IPR2020-01302), the Canon challenges to Slingshot (IPR2023-00312/-00313), the Apple IPRs against DoDots (IPR2023-00937/938/939), the ParkerVision defenses against Texas Instruments/NXP (IPR2024-00934/-00935/-00936) and MediaTek/Realtek (IPR2025-00030, IPR2025-00325), and a ParkerVision Director Review request in IPR2024-00934.

Notable outcomes. The most prominent tracked matters are Slingshot Printing LLC v. HP Inc. and the related HP Inc. v. Slingshot Printing LLC IPRs. The parallel Canon campaign went adversely for his client: the Board issued final written decisions holding all challenged claims of several Slingshot printhead patents unpatentable (e.g., IPR2023-00313, July 30, 2024), and the Federal Circuit affirmed under Rule 36 (Law360, July 2026). On the ParkerVision side, the litigation and IPR docket has been extensive and ongoing, with at least one petitioner (MediaTek) stipulating to drop its district-court invalidity defense in exchange for IPR institution. I did not find a verifiable jury verdict or damages award attributable to him.

Bar / education. B.S. in mechanical engineering, Binghamton University (SUNY); J.D., Hofstra University (Maurice A. Deane School of Law); admitted to the New York bar (2003) and registered to practice before the USPTO (Reg. No. 46,418). He is noted as not admitted in Virginia, appearing pro hac vice in Texas matters.