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 The Gilbo Law Group, Menlo Patent Agcy LLC, and Qualcomm, Inc..

Top cities in California

All practitioners in California

Jeffrey Edward Gilbo

Reg. 77938

Patent agent

The Gilbo Law Group

GLENDALE, CA · 91208

747-255-7385

David R Gildea

Reg. 38465

Patent agent

Menlo Patent Agcy LLC

Menlo Park, CA · 94025

650-853-0189

Robert W Giles

Reg. 54122

Patent attorney

Qualcomm, Inc.

San Diego, CA · 92121

858-658-4719

Angus R Gill

Reg. 51133

Patent agent

Orrick, Herrington & Sutcliffe LLP

Menlo Park, CA · 94025

650-614-7400

Eric K. Gill

Reg. 71709

Patent attorney

Sheppard, Mullin, Richter & Hampton LLP

San Diego, CA · 92130

858-720-8900

Sanjivpal S Gill

Reg. 42578

Patent attorney

Xperi

San Jose, CA · 95134

408-321-6012

William D Gill

Reg. 44124

Patent agent

IBM Corporation

San Jose, CA · 95193

408-256-2821

Noel C Gillespie

Reg. 47596

Patent agent

Buchalter

San Diego, CA · 92101-8494

619-787-6668

Justin J Gillett

Reg. 71099

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Paul A Gillette

Reg. 56360

Patent attorney

Farjami & Farjami LLP

Mission Viejo, CA · 92691

949-282-1000

Ian W. Gillies

Reg. 62280

Patent attorney

Knobbe Martens Olson & Bear LLP

Irvine, CA · 92614

858-707-4000

Harold E Gillmann

Reg. 25336

Patent attorney

Woodland Hills, CA · 91367

818-400-2360

Michael J Gilly

Reg. 42579

Patent agent

GEN-PROBE INCORPORATED

San Diego, CA · 92121

858-410-7866

Jerry Davis Gilmer

Reg. 44711

Patent attorney

San Jose, CA · 95125

408-608-9054

John O Gilmore

Reg. 46375

Patent attorney

Palo Alto, CA · 94301

650-323-6620

Gideon Gimlan

Reg. 31955

Patent attorney

Los Gatos, CA · 95032

408-315-1026

Francis O Ginah

Reg. 44712

Patent attorney

Gilead Sciences, Inc.

Foster City, CA · 94404

650-372-7942

Karisa Joy Gingerich

Reg. 901820

Limited recognition

University of San Francisco School of Law

San Francisco, CA · 94117-1080

514-214-5411

Brenden S Gingrich

Reg. 60295

Patent attorney

Knobbe, Martens, Olsen & Bear LLP

San Diego, CA · 92130

858-707-4000

Cole Robert Gingrich

Reg. 79228

Patent attorney

YHE Law LLP

Lafayette, CA · 94549

141-561-29954

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

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.