Patent litigation attorney
James S. Tsuei
32 tracked appearances — 28 plaintiff · 4 defendant.
Specialty & background
Date: 2026-05-12
Subject: Professional Summary: James S. Tsuei
James S. Tsuei is a partner at the litigation boutique Russ August & Kabat, where he specializes in intellectual property disputes with a focus on patent litigation. His practice encompasses a range of technologies, including software, data management and compression, smartphones, and display technologies like OLED. Prior to joining Russ August & Kabat, he was an attorney at Durie Tangri LLP (2015-2018) and Quinn Emanuel Urquhart & Sullivan LLP (2012-2015).
Consistent with his firm's focus, Mr. Tsuei's practice is exclusively plaintiff-side, as reflected in his tracked appearances. He represents patent holders in enforcement campaigns against large technology companies. His notable matters include representing Athena Security against Google and Hewlett Packard Enterprise, as well as representing Datonics LLC in cases against The Trade Desk and Neustar.
Mr. Tsuei has experience in every stage of litigation in federal courts and also litigates before the Patent Trial and Appeal Board (PTAB).
He earned his J.D. (cum laude) from the University of Pennsylvania Law School and a B.A. from the University of California, Los Angeles. He is an active member of the State Bar of California.
Firms
Roles
- counsel9
- Counsel6
- of counsel6
- appellate counsel2
- back-up counsel2
- Of Counsel1
- lead counsel1
- attorney1
- of record1
- appellate-stage counsel1
- pro hac vice (likely)1
Cases (32)
- π plaintiffAdobe Inc. v. Realtime Adaptive Streaming LLCRuss August & Kabat · back-up counsel
- π plaintiffAthena Security Inc v. Google LLCRuss August & Kabat · counsel
- π plaintiffAthena Security, LLP v. Hewlett Packard Enterprise CompanyRuss August & Kabat · counsel
- π plaintiffComcast Cable Communications, LLC v. Fallon et al.Russ August & Kabat · appellate counsel
- Δ defendantComcast Cable Communications, LLC v. Realtime Adaptive Streaming LLCRuss, August & Kabat · appellate-stage counsel
- π plaintiffDatonics LLC v. Neustar, Inc.Russ August & Kabat · Counsel
- π plaintiffDatonics LLC v. The Trade Desk, Inc.Russ August & Kabat · Counsel
- Δ defendantGoogle LLC v. Headwater Research LLCRuss August & Kabat · Of Counsel
- π plaintiffGoogle LLC v. Realtime Adaptive Streaming LLCRuss, August & Kabat · back-up counsel
- Δ defendantGoogle LLC v. Realtime Adaptive Streaming LLCRuss August & Kabat · pro hac vice (likely)
- Δ defendantGoogle LLC v. Virtamove, Corp.Russ August & Kabat
- π plaintiffHeadwater Research LLC v. [defendant not confirmed]Russ August & Kabat · attorney
- π plaintiffHeadwater Research LLC v. Amazon.com, Inc.Russ August & Kabat · lead counsel
- π plaintiffHeadwater Research LLC v. Apple Inc.Russ August & Kabat · Counsel
- π plaintiffHeadwater Research LLC v. Charter Communications, Inc.Russ August & Kabat · counsel
- π plaintiffHeadwater Research LLC v. DISH Network Corp. et al.Russ August & Kabat · counsel
- π plaintiffHeadwater Research LLC v. Google LLCDurie Tangri · counsel
- π plaintiffHeadwater Research LLC v. Samsung Electronics Co., Ltd. et al.Russ August & Kabat · counsel
- π plaintiffHeadwater Research LLC v. Supercell OyRuss August & Kabat · of counsel
- π plaintiffHFT Solutions LLC v. Optiver US LLC et al.Russ August & Kabat · counsel
- π plaintiffIntent IQ, LLC v. MNTN, Inc.Russ August & Kabat · of counsel
- π plaintiffRealtime Adaptive Streaming LLC v. Adobe Systems Inc.Russ, August & Kabat · counsel
- π plaintiffRealtime Adaptive Streaming LLC v. Google LLCRuss, August & Kabat · of counsel
- π plaintiffRealtime Adaptive Streaming LLC v. Google LLC et al.Russ, August & Kabat · of record
- π plaintiffRealtime Adaptive Streaming LLC v. Google LLC et al.Russ, August & Kabat · of counsel
- π plaintiffRealtime Adaptive Streaming LLC v. Google LLC et al.Russ, August & Kabat · of counsel
- π plaintiffRealtime Adaptive Streaming LLC v. Sling TV L.L.C. et al.Russ August & Kabat · appellate counsel
- π plaintiffUntitled caseRuss August & Kabat · Counsel
- π plaintiffUntitled caseRuss August & Kabat · Counsel
- π plaintiffUntitled caseRuss August & Kabat · of counsel
- π plaintiffVirtamove Corp. v. International Business Machines Corp. et al.Russ August & Kabat · Counsel
- π plaintiffVirtaMove Corp. v. Oracle CorporationRuss August & Kabat · counsel