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 Goodwin Procter LLP, Adobe Systems Inc., and Soleado Law, PC.

Top cities in California

All practitioners in California

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

Ying Li

Reg. 65924

Patent attorney

Fernando & Partners LLP

Santa Clara, CA · 95054

650-521-5390

Yipeng Li

Reg. 60595

Patent attorney

Paradice and Li, LLP

Campbell, CA · 95011

408-389-0268

Yongdan Li

Reg. 62242

Patent attorney

UC Berkeley

Berkeley, CA · 94720-2320

510-664-2974

Yue Li

Reg. 69573

Patent attorney

Morrison & Foerster LLP

Palo Alto, CA · 94304

650-813-5600

Zhaolong Li

Reg. 70683

Patent attorney

Davis, CA · 95616

301-963-1992

Zhaoyang Li

Reg. 46872

Patent agent

Fennemore

Oakland, CA · 94607

510-834-6600

Zhehui Li

Reg. 84614

Patent agent

Los Angeles, CA · 90018

330-289-7166

Zhi Li

Reg. 66694

Patent agent

at&t Services, Inc.

San Ramon, CA · 94583

925-904-0164

Zhifei Li

Reg. 81044

Patent attorney

Monterey, CA · 93940

424-333-4575

Ziyong Li

Reg. 76089

Patent attorney

Quinn Emanuel Urquhart & Sullivan, LLP

San Francisco, CA · 94111

415-875-6373

Gabriella S. Liace

Reg. 81612

Patent agent

Kleinberg & Lerner LLP

Century City, CA · 90067

310-557-1511

Alyssa Y. Liang

Reg. 59179

Patent agent

Palo Alto, CA · 94301

650-996-7068

Amy K Liang

Reg. 74194

Patent attorney

O'Melveny & Myers

San Francisco, CA · 94111

415-984-8905

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.