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 Bozicevic, Field & Francis LLP, Cooley LLP, and Applied Minds, LLC.

Top cities in California

All practitioners in California

James S Keddie

Reg. 48920

Patent agent

Bozicevic, Field & Francis LLP

Redwood City, CA · 94065

650-327-3400

Roland H Kedikian

Reg. 60915

Patent attorney

Glendale, CA · 91205

818-409-8911

Pamela Lau Kee

Reg. 36184

Patent agent

Los Gatos, CA · 95032

408-358-6958

Heidi L Keefe

Reg. 40673

Patent attorney

Cooley LLP

Palo Alto, CA · 94304-1130

650-843-5000

Kevin R Keegan

Reg. 60783

Patent attorney

Applied Minds, LLC

Glendale, CA · 91201

818-332-5293

Daniel C Keeler

Reg. 72527

Patent attorney

Weaver Austin Villeneuve & Sampson, LLP

Oakland, CA · 94607

510-663-1100

Pierre J Keeley

Reg. 57045

Patent attorney

Keeley Law

Redwood City, CA · 94061

650-279-5770

Sharon S Keeney

Reg. 47701

Patent agent

Twin Peaks, CA · 92391

909-337-2238

Lindsay B Keever

Reg. 66015

Patent agent

UCLA Office of Intellectual Property

Los Angeles, CA · 90095

310-794-0204

Giorgios N Kefallinos

Reg. 69777

Patent attorney

K & L Gates

Irvine, CA · 92614

949-253-0900

Anthony J Kefalos

Reg. 61931

Patent attorney

Decision Sciences International Corporation

Poway, CA · 92064

858-571-1900

Alison E. Keiper

Reg. 76427

Patent agent

Fenwick & West LLP

San Francisco, CA · 94104

650-335-7648

Emily L Keliher

Reg. 84857

Patent agent

San Diego, CA · 92122

619-994-0243

Kyle W. Kellar

Reg. 71165

Patent attorney

WOMBLE BOND DICKINSON (US) LLP

Glendale, CA · 91203-1445

626-795-9900

Kathleen R. Kelleher

Reg. 62230

Patent attorney

Arcadia Science

Berkeley, CA · 94705

510-788-1110

Michael F Kelleher

Reg. 55321

Patent attorney

Folger Levin and Kahn LLP

San Francisco, CA · 94111

415-986-2800

Caroline L Keller

Reg. 50491

Patent attorney

Keller Patent and Trademark Law

Manhattan Beach, CA · 90266

310-372-2171

Lauren J Keller

Reg. 56553

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-721-6365

Christopher L Kelley

Reg. 42714

Patent attorney

Perkins Coie, LLP

Palo Alto, CA · 94304

650-838-4452

James L Kelley

Reg. 42715

Patent agent

Manhattan Beach, CA · 90266

310-318-2904

Sarita R Kelley

Reg. 50850

Patent agent

Chevron Corporation

San Ramon, CA · 94583-2324

Scott Wayne Kelley

Reg. 30762

Patent attorney

Kelly & Kelley, LLP

Woodland Hills, CA · 91367

818-347-7900

David C Kellogg

Reg. 62958

Patent attorney

Dolby Laboratories, Inc.

San Francisco, CA · 94103

415-645-5835

Eric A Kelly

Reg. 70302

Patent attorney

Fontana, CA · 92336

310-486-2698

Gianna G Kelly

Reg. 57922

Patent agent

Sonoma, CA · 95476

707-935-6100

Gilbert T. Kelly

Reg. 70988

Patent agent

Medlen & Carroll, LLP

Oakland, CA · 94612

469-454-4259

Kevin T Kelly

Reg. 64158

Patent attorney

Imperial County District Attorney's Office

El Centro, CA · 92243

310-709-5935

Mary E. Kelly

Reg. 78195

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3337

Peter M Kelly

Reg. 51282

Patent attorney

Peter M Kelly

Los Alamitos, CA, CA · 90720

714-306-4223

Robert Stanley Kelly

Reg. 25278

Patent attorney

Saratoga, CA · 95070

408-867-5648

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.