California

Patent attorneys in California

California hosts 9,567 active patent practitioners registered with the USPTO Office of Enrollment and Discipline. Patent attorneys and patent agents can both prepare and file patent applications, but only patent attorneys can also offer legal advice on prosecution strategy, freedom-to-operate analyses, and infringement opinions in California. Practitioners are concentrated across 20 cities, with the largest clusters in the metros listed below. Notable firms with multiple registered practitioners in the state include HUAN-YI LIN ATTORNEY-AT-LAW, Cadence Design Systems, Inc., and Varian Medical Systems.

Top cities in California

All practitioners in California

Huan Yi Lin

Reg. 66645

Patent attorney

HUAN-YI LIN ATTORNEY-AT-LAW

Huntington Beach, CA · 92649

213-618-2358

Issac T Lin

Reg. 50672

Patent attorney

Cadence Design Systems, Inc.

San Jose, CA · 95134

408-914-6637

Jack T Lin

Reg. 58597

Patent agent

Varian Medical Systems

Palo Alto, CA · 94304

650-224-8780

Jackie Lin

Reg. 75586

Patent attorney

Intellectual Property Law Group LLP

San Jose, CA · 95113

408-286-8933

Jason Zse-Cherng Lin

Reg. 37492

Patent agent

Saratoga, CA · 95070-4523

408-357-0609

Jeffrey Lin

Reg. 46875

Patent attorney

Wilson Sonsini Goodrich and Rosati PC

Palo Alto, CA · 94304

650-493-9300

John H Lin

Reg. 63734

Patent agent

Los Angeles, CA · 90025

310-442-9300

Joseph T Lin

Reg. 38225

Patent attorney

Triplel Ring Technologies, Inc.

Newark, CA · 94560

510-592-3000

Lucy Lin

Reg. 83778

Patent agent

Ionis Pharmaceuticals

Carlsbad, CA · 92010

760-931-9200

Menglu Lin

Reg. 74520

Patent attorney

Walnut Creek, CA · 94598

408-480-5369

Min Lin

Reg. 59578

Patent attorney

Neurocrine Biosciences, Inc.

San Diego, CA · 92130

858-416-7614

Patti Y. Lin

Reg. 70558

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3176

Richard Cheng-hong Lin

Reg. 56682

Patent attorney

Bunsow De Mory LLP

Redwood City, CA · 94063

650-351-7248

Rick H Lin

Reg. 61933

Patent attorney

Toshiba America Electronic Components, Inc.

Irvine, CA · 92618

949-430-1589

Roy J. Lin

Reg. 67098

Patent attorney

Remote, CA · 94111

310-923-1734

Sara C. Lin

Reg. 71501

Patent agent

Altis Law Group, Inc.

Brea, CA · 92821

714-706-3227

Shinn-Jieh Lin

Reg. 55932

Patent attorney

Oakley, CA · 94561

510-213-2753

Shufan Lin

Reg. 84593

Patent agent

Yorba Linda, CA · 92887

949-975-9703

Szu-Min Lin

Reg. 55385

Patent agent

Advanced Sterilization Products

Irvine, CA · 92618

949-453-6484

Vic Y Lin

Reg. 43754

Patent attorney

Innovation Capital Law Group, LLP

Irvine, CA · 92612

949-954-5430

Wen-Yao E Lin

Reg. 70173

Patent agent

Oxnard, CA · 93030

408-234-9236

Xiao Lin

Reg. 75444

Patent agent

Fenwick & West

Mountain View, CA · 94041

650-335-4916

Yinan Lin

Reg. 74667

Patent attorney

Dickinson Wright RLLP

Mountain View, CA · 94043

408-701-6127

Nancy J Linck

Reg. 31920

Patent attorney

Linck Consulting

San Diego, CA · 92103

202-640-0613

Donald Edward Lincoln

Reg. 34213

Patent attorney

Salinas, CA · 93907

831-320-3641

Nicholas A Lind

Reg. 68250

Patent attorney

Bryan Cave LLP

San Francisco, CA · 94105

415-675-3467

Gordon Reinhold Lindeen· III

Reg. 33192

Patent attorney

Loza & Loza, LLP

Upland, CA · 91786

877-406-5164

Simon H. Linder

Reg. 67025

Patent agent

Saratoga, CA · 95070

408-866-5340

John C Lindgren

Reg. 36584

Patent attorney

Tessera Technologies, Inc.

San Jose, CA · 95134

613-698-8841

Roger A. Lindley

Reg. 66113

Patent agent

Applied Materials, Inc.

Sunnyvale, CA · 94085

408-584-0828

Common questions

Do I need a patent attorney based in California?

No. Every USPTO-registered patent practitioner is licensed to file applications on behalf of inventors in any state, regardless of where the practitioner's office is. Choosing a California-based practitioner can simplify in-person inventor signings, local meetings, and same-time-zone calls, but it is not a legal requirement.

How many patent attorneys are licensed in California?

9,567 active USPTO-registered patent practitioners list a California office address on the OEDCI roster. This includes both patent attorneys (who can also offer legal advice) and patent agents (who can prepare and file patents but not offer broader legal advice).

What is the difference between a patent attorney and a patent agent?

Both pass the USPTO Patent Bar and can prepare, file, and prosecute patent applications. Only patent attorneys also hold a state bar license, meaning they can additionally offer legal advice on infringement, licensing, and litigation strategy. Patent agents tend to charge less per hour and are common at large in-house IP departments.