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 Ginzburg and Bronshteyn APC, Sole Proprietor, and ZOLL Medical Corp..

Top cities in California

All practitioners in California

Alexander R Ginzburg

Reg. 38466

Patent attorney

Ginzburg and Bronshteyn APC

Los Angeles, CA · 91302

310-914-3222

Yakov Ginzburg

Reg. 67176

Patent attorney

Los Angeles, CA · 91604

323-788-0589

Vincent Gerard Gioia

Reg. 19959

Patent attorney

Palm Desert, CA · 92255

951-267-0028

Gregory J Giotta

Reg. 32028

Patent attorney

Sole Proprietor

Berkeley, CA · 94708

510-703-6110

Steven Michael Giovannetti

Reg. 51739

Patent attorney

ZOLL Medical Corp.

San Jose, CA · 95131

408-541-2140

Philip A Girard

Reg. 28848

Patent attorney

Girard & Equitz LLP

Lafayette, CA · 94549-1369

925-284-0500

Carol Akmal Hanna Girgis

Reg. 80907

Patent attorney

Lewis Brisbois Bisgaard & Smith, LLP

San Francisco, CA · 94105

415-262-8567

Srinivas K. Giriraj Pathmanaban

Reg. 75986

Patent attorney

Latham & Watkins, LLP

Menlo Park, CA · 94025

650-470-4851

Sheri L Gish

Reg. 62465

Patent agent

Mountain View, CA · 94041

650-417-8100

Carl M. Gismervig

Reg. 68330

Patent attorney

Dechert LLP

Mountain View, CA · 94040

650-813-4996

Larry F Gitlin

Reg. 28015

Patent attorney

Beaumont Gitlin Tashjian

Woodland Hills, CA · 91367

818-884-9998

John E Giust

Reg. 38064

Patent attorney

The Law Offices of John Giust

San Diego, CA · 92131

619-993-1656

David E Givens

Reg. 56192

Patent attorney

Cupertino, CA · 95014

408-887-5237

Alexander C D Giza

Reg. 51740

Patent attorney

Hueston Hennigan LLP

Los Angeles, CA · 90014

213-788-4340

Stephen C Glade

Reg. 57601

Patent attorney

Lawrence Berkeley National Laboratory

Berkeley, CA · 94720

510-486-6503

Zachary A Glantz

Reg. 68686

Patent attorney

Diamond Bar, CA · 91765

413-464-1801

Daniela Glaser

Reg. 78905

Patent attorney

Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.

San Francisco, CA · 94104

415-432-6088

Kenneth N Glass

Reg. 42587

Patent attorney

Glass and Associates

Los Gatos, CA · 95030

408-354-4448

Darin J Glasser

Reg. 51741

Patent attorney

O'Melveny and Myers LLP

Newport Beach, CA · 92660

949-760-9600

Khanh Thi My Huynh Glatzel

Reg. 68973

Patent attorney

Premium IP Services, P.C.

Escondido, CA · 92027

619-889-2990

Marilyn E Glaubensklee

Reg. 35521

Patent attorney

Western Digital Corp.

Milpitas, CA · 95035

408-801-2247

Marvin A Glazer

Reg. 28801

Patent attorney

Haynes and Boone, LLP

Palo Alto, CA · 94306

650-687-8826

Darius Gleason

Reg. 71246

Patent attorney

The Law Office of Darius Gleason APC

Yorba Linda, CA · 92886

949-302-5687

Jamie M. Gleason-Bremer

Reg. 81273

Patent agent

Antheros Legal Advisors LLP

San Diego, CA · 92122

185-821-68370

Michael A Glenn

Reg. 30176

Patent attorney

Perkins Coie LLP

Palo Alto, CA · 94304

650-838-4495

Walter B Glenn

Reg. 44713

Patent attorney

Shay Glenn LLP

San Mateo, CA · 94403

650-212-1700

Jonathan R Glicksberg

Reg. 68045

Patent agent

West Hills, CA · 91307

818-703-1649

Robert H. Glidden

Reg. 66054

Patent attorney

Moraga, CA · 94556

925-247-4059

James E Glore

Reg. 51744

Patent attorney

Intel Corp

San Jose, CA · 95134

669-544-7674

Peter Jon Gluck

Reg. 38022

Patent attorney

Patnstr, APC

San Juan Capistrano, CA · 92675-3224

949-680-9066

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.