California

Patent attorneys in California

California hosts 9,553 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 Armond Wilson LLP, Durie Tangri LLP, and Procopio Cory Hargreaves and Savitch LLP.

Top cities in California

All practitioners in California

Josepher Li

Reg. 74998

Patent attorney

Armond Wilson LLP

Newport Beach, CA · 92660

949-386-8229

Joyce C Li

Reg. 75937

Patent attorney

Durie Tangri LLP

San Francisco, CA · 94111

415-362-6666

Kamwah Li

Reg. 34211

Patent attorney

Procopio Cory Hargreaves and Savitch LLP

San Diego, CA · 92101

619-515-3253

Karina Martha G Li

Reg. 80887

Patent agent

Power Integrations

San Jose, CA · 95138

408-414-9635

Lance A Li

Reg. 73605

Patent attorney

Nixon Peabody LLP

San Francisco, CA · 94111

415-984-8412

Man Li

Reg. 57400

Patent attorney

Mei & Mark LLP

Beverly Hills, CA · 90210

888-860-5678

Ning Li

Reg. 68341

Patent agent

Sunnyvale, CA · 84087

408-554-5048

Pei Heng Li

Reg. 83481

Patent attorney

Apple Inc.

Cupertino, CA · 95014

669-276-0336

Peng Li

Reg. 67833

Patent attorney

Chen Yoshimura LLP

Los Angeles, CA · 90013

858-342-7063

Qianru Li

Reg. 70682

Patent agent

Genentech, Inc.

South San Francisco, CA · 94080

650-491-5167

Richard S Li

Reg. 81082

Patent attorney

Lowenstein Sandler LLP

Palo Alto, CA · 94031

650-433-5800

Sam X Li

Reg. 58517

Patent agent

Jones Day LLP

Los Angeles, CA · 90071

213-243-2705

Shihong Li

Reg. 82012

Patent agent

Fish and Richardson

Redwood City, CA · 94063

650-839-5089

Shirley X Li

Reg. 63156

Patent agent

Goodwin Procter LLP

Menlo Park, CA · 94025

Thomas X Li

Reg. 37079

Patent attorney

Adobe Systems Inc.

San Jose, CA · 95110

408-536-6360

Tianyuzi Li

Reg. 78871

Patent agent

San Diego, CA · 92130

402-321-5725

Wanying Li

Reg. 81553

Patent agent

Soleado Law, PC

San Francisco, CA · 94108

408-647-6075

Wei Li

Reg. 75386

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3425

Wen Li

Reg. 62185

Patent agent

BeOne Medicines USA, Inc

San Carlos, CA · 94070

408-641-4549

Wenjie Li

Reg. 59265

Patent attorney

The Boeing Company

Seal Beach, CA · 90740

562-241-0514

Wuxing Li

Reg. 71698

Patent agent

Lucysmile, LLC

Arcadia, CA · 91007

626-254-9964

Xia Li

Reg. 71699

Patent agent

San Diego, CA · 92127

352-871-8920

Xia Li

Reg. 73990

Patent agent

Apple Inc

Cupertino, CA · 95014

617-838-7981

Xiao Li

Reg. 66897

Patent attorney

Cisco Systems

San Jose, CA · 95134

Xiaoqian Li

Reg. 79760

Patent agent

Morgan Lewis

Palo Alto, CA · 94304-1124

650-843-7853

Xu Li

Reg. 84213

Patent attorney

Santa Clara, CA · 95050

310-694-4256

Yan-Xin Li

Reg. 76981

Patent attorney

Kirkland & Ellis LLP

San Francisco, CA · 94104

415-439-1618

Yangyang Li

Reg. 70554

Patent attorney

Golden Hippo Media

Woodland HIlls, CA · 91364

818-564-4106

Yi Li

Reg. 66546

Patent agent

Milpitas, CA · 95035

408-386-9966

Yida Li

Reg. 800033

Limited recognition

Leica Biosystems

Vista, CA · 92081

763-358-4899

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?

9,553 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.