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 Attorney at Law, A.J. Gokcek, and Takeda Pharmaceuticals.

Top cities in California

All practitioners in California

Lawrence R. Goerke

Reg. 45927

Patent attorney

Attorney at Law

San Jose, CA · 95112

408-892-8295

David E Goggin

Reg. 56194

Patent agent

San Francisco, CA · 94109

415-567-6773

Aidan S Goil

Reg. 63094

Patent agent

Woodland Hills, CA · 91367

440-823-8306

A. J. Ihsan Gokcek

Reg. 57602

Patent attorney

A.J. Gokcek

Palo Alto, CA · 94306

334-332-1157

Tufan Gokirmak

Reg. 76632

Patent agent

Takeda Pharmaceuticals

San Diego, CA · 92121

858-519-7556

Bryant R Gold

Reg. 29715

Patent attorney

Valencia Technologies Corporation

Valencia, CA · 91355

661-775-1414

Jacob A. Gold

Reg. 82536

Patent agent

Davis, CA · 95617

206-304-8014

Linli L Golden

Reg. 40622

Patent attorney

Rocklin, CA · 95765

David H Goldenberg

Reg. 35883

Patent attorney

Hermosa Beach, CA · 90254

310-379-5048

Michelle Goldhaber

Reg. 79832

Patent attorney

Morrison and Foerster

Palo Alto, CA · 94304-1018

650-283-0180

Berrie R. Goldman

Reg. 64246

Patent attorney

Invitae Corporation

San Francisco, CA · 94103

818-261-4569

William G Goldman

Reg. 42590

Patent attorney

Gray Cary Ware and Freidenrich LLP

East Palo Alto, CA · 94303

650-833-2112

Micah P. Goldsmith

Reg. 43638

Patent attorney

Microsoft Corporation

Mountain View, CA · 94043

650-693-0694

Abe Goldstein

Reg. 29922

Patent attorney

Santa Ana, CA · 92705

714-838-4953

Mark Andrew Goldstein

Reg. 50759

Patent attorney

SoCal IP Law Group LLP

Westlake Village, CA · 91362

805-230-1350

Robin Diane Goldstein

Reg. 31258

Patent attorney

San Jose, CA · 95124

408-356-1890

Sol L Goldstein

Reg. 20376

Patent attorney

Los Angeles, CA · 90025

310-477-9947

Vaheh Golestanian Nemagrdi

Reg. 71070

Patent agent

Orange, CA · 92865

818-726-0149

Anthony M. Gomez

Reg. 83697

Patent agent

Woodland Hills, CA · 91367

818-970-3606

Steven K Gong

Reg. 64147

Patent attorney

Google

Mountain View, CA · 94043

650-999-0258

James Gonko

Reg. 45568

Patent attorney

Western Digital

Irvine, CA · 92612

949-672-9881

Linda K Gont

Reg. 67715

Patent agent

Shay Glenn LLP

San Mateo, CA · 94403

650-212-1700

Mark J. Gonzales

Reg. 60196

Patent agent

Analog Intellectual Property

Newark, CA · 94560

510-366-9574

Maxwell D. Gonzalez

Reg. 82583

Patent agent

Cooley LLP

Palo Alto, CA · 94304-1130

650-843-5434

Miguel Angel Gonzalez

Reg. 77966

Patent agent

Carpinteria, CA · 93013

805-259-8127

Naomi R Gonzalez

Reg. 67871

Patent attorney

Norwalk, CA · 90651

808-392-9891

Rolando Gonzalez

Reg. 63191

Patent attorney

BakerHostetler LLP

Costa Mesa, CA · 92626-7221

714-966-3507

Wiliulfo A Gonzalez

Reg. 67850

Patent attorney

Norwalk, CA · 90651

808-398-1892

Marcos Gonzalez Lopez

Reg. 82713

Patent agent

Wilson Sonsini

San Diego, CA · 92130

858-350-2305

Robert W Goode

Reg. 82389

Patent attorney

Law Office of Goode and Goode

Valley Center, CA · 92082

210-454-2118

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.