John B. Campbell

I'll research this attorney's background before drafting.

Let me dig into the recent firm move and case outcomes.

Now let me verify notable outcomes and PTAB work.

Specialty / focus areas. Campbell's patent practice centers on electronics and software-adjacent technologies: semiconductors (the Greenthread campaign against NXP, Texas Instruments, Cirrus Logic, ON Semiconductor and Sony), voice-processing and telecom software (Parus Holdings), wireless standards including 802.11n and LTE/WCDMA/GSM SEPs (Ericsson's campaigns against Samsung and against D-Link/Intel/Acer/Dell and others), and interactive TV/DVR technology (Rovi/TiVo v. Comcast, including ITC work). His firm bios also list servers, mobile devices, computer software, and earlier matters involving cardiac devices (Medtronic) and aircraft non-destructive testing (Lockheed Martin). He holds a B.S. in mechanical engineering and worked as an engineer/product manager before law school, which is consistent with the mix of electrical- and mechanical-arts matters.

Side preference. The tracked docket is overwhelmingly patent-owner/plaintiff side — 13 of 17 appearances — and is dominated by Parus Holdings (as lead or lead trial counsel in litigations against Google, Amazon, Microsoft, and Samsung, plus related IPRs) and Greenthread (asserting semiconductor patents against chipmakers and OEMs). The four defendant-side entries come from Greenthread's counter-campaign (Monolithic Power, ON Semiconductor, Sony) rather than from an operating-company defense practice. His broader web-sourced record shows genuine two-way work, however: he has defended Medtronic and Lockheed Martin in district court and has filed IPR petitions on behalf of accused infringers such as American Airlines in the Intellectual Ventures disputes. His new firm markets itself as handling "both sides of the docket."

Firm context. All 17 tracked appearances are at McKool Smith, where he was an Austin-based principal and built his career. In September 2026 he left McKool Smith with Joshua Budwin, Richard Kamprath, and Kevin Burgess to launch Budwin Kamprath Burgess & Campbell PLLC, an IP boutique with offices in Austin, Dallas, and Marshall, Texas; the new firm states it will represent patent owners of varying sizes and take some matters on contingency. Earlier in his career he clerked for the Hon. Sue L. Robinson (D. Del.). He is USPTO Registration No. 54,665; sources sometimes render him "John B. Campbell, Jr."

Notable cases and outcomes. His most-cited wins are i4i Ltd. v. Microsoft (jury verdict of validity and infringement, affirmed by the Federal Circuit and by a unanimous Supreme Court in Microsoft v. i4i) and Ericsson v. D-Link (eight-figure 2013 jury award on 802.11n technology). On the Parus matters, results are mixed: in August 2024 the PTAB issued a final written decision rejecting Google's challenge to Parus's U.S. Patent 6,721,705 (IPR2022-00279), after earlier denials of institution on the '455 and '190 patents — but in March 2025 the Federal Circuit affirmed a § 101 invalidity judgment against Parus on the '402 voice-browser patent in Parus Holdings v. Google (No. 23-2297). On the tracked list, Unwired Planet v. Apple is his Federal Circuit appellate matter.

PTAB / IPR experience. Yes — he appears regularly, not just incidentally. He has been designated lead counsel in IPR petitions going back at least to 2017 (e.g., IPR2017-01884) and as recently as late 2025 in the Intellectual Ventures IPR cluster on behalf of American Airlines (IPR2025-00782, -01510). His experience runs in both directions: petitioner-side on behalf of accused infringers, and patent-owner side defending Parus's claims.

Bar / education. Admitted in Texas (2002) and before the USPTO, the Federal Circuit, and the N.D./E.D./W.D. Tex.; J.D. with honors, University of Texas School of Law (2002); M.B.A., Xavier University (1998); B.S., Mechanical Engineering, Ohio Northern University (1996).

Caveat: the exit from McKool Smith and launch of BKBC occurred days ago (Sept. 9, 2026) and is sourced to the firm's launch release and Law360/Texas Lawbook coverage; the case list's firm attributions predate that move. I could not independently verify an Amazon or Samsung trial verdict outcome for the Parus cases, so I have not characterized those.