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 Snell & Wilmer LLP, Fish and Richardson P.C., and Oracle Corporation.

Top cities in California

All practitioners in California

Aleksandr Gelberg

Reg. 65027

Patent attorney

Fish and Richardson P.C.

San Diego, CA · 92130

858-678-4392

Michael A Gelblum

Reg. 55971

Patent attorney

Oracle Corporation

Redwood Shores, CA · 94065

650-506-5375

Noah Jacob Fromm Geldberg

Reg. 78160

Patent attorney

Valley Glen, CA · 91401

818-994-2920

Craig A Gelfound

Reg. 41032

Patent attorney

Arent Fox LLP

Los Angeles, CA · 90013

213-629-7400

Michael L Gencarella

Reg. 44703

Patent attorney

WOMBLE CARLYLE SANDRIDGE RICE

cupertino, CA · 95014

408-341-3015

Timothy H Gens

Reg. 29153

Patent attorney

Palo Alto, CA · 94306

650-949-4880

Erik T. Gentalen

Reg. 74398

Patent agent

Erik Gentalen Consulting, LLC

Fremont, CA · 94539

650-644-8881

Jonathan Gentin

Reg. 39991

Patent attorney

CSR PLC

Mountain View, CA · 94040

650-625-0700

June L Gentry

Reg. 71462

Patent agent

Gentry Ventures, LLC

Mountain View, CA · 94043

314-518-1095

Gordon C George

Reg. 55713

Patent attorney

Danville, CA · 94526-0787

925-837--1111

Thomas George

Reg. 45740

Patent attorney

Samsung Research America

Montana View, CA · 94043

408-718-0144

Bilyana P Georgieva

Reg. 59175

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320-1799

424-422-6971

Matthew K Georgy

Reg. 84854

Patent agent

San Diego, CA · 92130

858-353-6070

Michael M Gerardi

Reg. 33698

Patent attorney

Menifee, CA · 92584

909-672-4354

Eliot S Gerber

Reg. 18115

Patent attorney

Walnut Creek, CA · 94595

925-280-4942

Jackson P Gerber

Reg. 75582

Patent attorney

Newbury Park, CA · 91320

310-988-5645

Matthew A Gerges

Reg. 83622

Patent attorney

O'Melveny & Myers LLP

Newport Beach, CA · 92660

949-823-7981

Justas Geringson

Reg. 57033

Patent attorney

Hayward, CA · 94542

310-560-0929

Jayshree A. Gerken

Reg. 81927

Patent attorney

Loza & Loza LLP

Encinitas, CA · 92024

858-869-2101

Jason R. German

Reg. 69497

Patent attorney

The Law Firm of Jason R. German

San Francisco, CA · 94119

650-260-5479

Joel B German

Reg. 48676

Patent attorney

Edwards Lifesciences

Irvine, CA · 92614

949-250-6425

Roberta D German

Reg. 43902

Patent agent

Element Biosciences

San Diego, CA · 92121

619-353-0300

Matthew Gerpheide

Reg. 79304

Patent agent

Oceanside, CA · 92056

805-423-6146

Frank L. Gerratana

Reg. 62653

Patent attorney

Calyx Law LLP

San Francisco, CA · 94105

617-294-9735

Karin M Gerstin

Reg. 54119

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2300

Jason A. Gersting

Reg. 65890

Patent attorney

Snell & Wilmer LLP

Costa Mesa, CA · 92614

714-427-7000

Marguerite E Gerstner

Reg. 32695

Patent attorney

TE Connectivity Corporation

Fremont, CA · 94555

650-361-2483

Michael E Gertner

Reg. 58276

Patent agent

Menlo Park, CA · 94026

650-283-9388

Albin H Gess

Reg. 25726

Patent attorney

Snell & Wilmer LLP

Costa Mesa, CA · 92626

714-427-7020

Derek D Gess

Reg. 71463

Patent agent

Yorba Linda, CA · 92886

714-340-3130

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.