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 Wilson Sonsini Goodrich & Rosati, Illumina, Inc., and Polsinelli.

Top cities in California

All practitioners in California

Jean L Lewis

Reg. 43752

Patent attorney

Huntington Beach, CA · 92648

Lindsey S Lewis

Reg. 81786

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-239-5375

Terrell P Lewis

Reg. 29227

Patent attorney

Fallbrook, CA · 92028

760-458-8261

Tristan D. Lewis

Reg. 79908

Patent agent

Anaheim, CA · 92808

714-814-5226

Yan Leychkis

Reg. 60440

Patent attorney

Illumina, Inc.

San Diego, CA · 92122

858-291-6118

Arrienne Monique Lezak

Reg. 51943

Patent attorney

Polsinelli

Palo Alto, CA · 94025

703-627-5458

Alex S. Li

Reg. 68773

Patent attorney

Teradata

San Diego, CA · 92127

858-485-4000

Benjamin Chun Yeung Li

Reg. 76855

Patent attorney

Cooley LLP

Palo Alto, CA · 94304-1130

650-843-5671

Bin Li

Reg. 75561

Patent attorney

Goertek Electronics Inc.

Santa Clara, CA · 95054

408-542-9710

Chia-Chi Li

Reg. 64856

Patent agent

KILPATRICK TOWNSEND & STOCKTON, LLP

San Francisco, CA · 94111

415-576-0200

Feng Li

Reg. 75048

Patent agent

San Jose, CA · 95131

650-340-3061

Fengling Li

Reg. 62962

Patent attorney

Intel Corporation

Santa Clara, CA · 95054-1549

408-765-7794

Hao Li

Reg. 59577

Patent agent

Wilson Sonsini Goodrich & Rosati, P.C.

Palo Alto, CA · 94304

650-565-3922

James Yuanxin Li

Reg. 35546

Patent attorney

Oakland, CA · 94610-2730

415-894-5271

Jessica Y Li

Reg. 78504

Patent agent

Redwood City, CA · 94063

650-839-5061

Jie Li

Reg. 56681

Patent agent

Greenberg Traurig LLP

San Francisco, CA · 94111

415-655-1255

Jing J Li

Reg. 44871

Patent attorney

LiLaw

Cupertino, CA · 95015

650-521-5813

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 agent

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

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.