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 Knobbe Martens Olson and Bear LLP, Boston Scientific Corporation, and TechKnowledge Law Group LLP.

Top cities in California

All practitioners in California

Benjamin A Katzenellenbogen

Reg. 53102

Patent attorney

Knobbe Martens Olson and Bear LLP

Irvine, CA · 92614

949-760-0404

Albert K Kau

Reg. 40672

Patent attorney

Boston Scientific Corporation

Valencia, CA · 91355

661-949-4542

Craig Robert Kaufman

Reg. 34636

Patent attorney

TechKnowledge Law Group LLP

Redwood City, CA · 94065

415-902-0602

Karen Louise Kaufman

Reg. 57239

Patent attorney

Mountian View, CA · 94041

408-712-4776

Michael Alan Kaufman

Reg. 32998

Patent attorney

San Anselmo, CA · 94960

415-457-1102

Barry J Kauker

Reg. 71382

Patent agent

Stryker

San Jose, CA · 95138

408-754-2119

Joel A Kauth

Reg. 41886

Patent attorney

KPPB LLP

Long Beach, CA · 90806

949-852-0000

Lance G Kavanaugh

Reg. 51865

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3252

David Kaveh

Reg. 68640

Patent attorney

KPPB, LLP

Los Angeles, CA · 90017

949-852-0000

Chadd T Kawai

Reg. 41109

Patent attorney

The Walt Disney Company

Burbank, CA · 91521

818-560-8994

Ramsey F Kawar

Reg. 51866

Patent attorney

San Mateo, CA · 94402

650-430-0487

Sunil K KC

Reg. 67858

Patent agent

San Diego, CA · 92127

858-229-4890

Audrey Dickason Keane

Reg. 37367

Patent agent

Keane Enterprises

La Jolla, CA · 92037

619-997-3122

Stephen D Keane

Reg. 61491

Patent attorney

Morrison & Foerster LLP

San Diego, CA · 92130

858-314-5474

Carolyn R. Kearney

Reg. 78476

Patent agent

Kilpatrick Townsend & Stockton LLP

San Francisco, CA · 94111

732-379-8334

Brian J Keating

Reg. 39520

Patent attorney

Hillsborough, CA · 94010

415-515-5209

Eskinder Kebret

Reg. 66427

Patent attorney

Kebr.et Firm, APC

Berkeley, CA · 94704

877-353-2738

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

Kyle W. Kellar

Reg. 71165

Patent attorney

WOMBLE BOND DICKINSON (US) LLP

Glendale, CA · 91203-1445

626-795-9900

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.