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 Google Inc., Kwok Patent Law, and Morrison & Foerster, LLP.

Top cities in California

All practitioners in California

Edward C Kwok

Reg. 33938

Patent attorney

Cupertino, CA · 95014

408-504-9097

John K Kwok

Reg. 46851

Patent attorney

Kwok Patent Law

Mountain View, CA · 94043

650-447-5211

Steffi K. Kwok

Reg. 81379

Patent agent

Fremont, CA · 94539

317-734-9589

Tony C Y Kwok

Reg. 75895

Patent agent

Morrison & Foerster, LLP

Los Angeles, CA · 90017

213-892-5360

Adam W. Kwon

Reg. 75653

Patent attorney

Munger, Tolles & Olson LLP

Los Angeles, CA · 90071

213-683-9261

Younghye Kwon

Reg. 61470

Patent agent

Cupertino, CA · 95014

408-540-8779

Raymond K O Kwong

Reg. 37165

Patent attorney

Fremont, CA · 94539

408-219-1186

Richard Kwun

Reg. 74517

Patent attorney

Sacramento, CA · 95834

916-802-7997

Yong J. Kwun

Reg. 66490

Patent attorney

Lewis Roca Rothgerber Christie, LLP

Glendale, CA · 91203

626-795-9900

John S Kyle

Reg. 48318

Patent attorney

Cooley Godward LLP

San Diego, CA · 92121

858-550-6025

Hannah M. Kyme

Reg. 83288

Patent agent

Fenwick and West LLP

Mountain View, CA · 94041

571-268-5491

Chia-Hao La

Reg. 57729

Patent attorney

Google Inc.

Mountain View, CA · 94043

650-336-8791

Esther La

Reg. 43734

Patent attorney

Dechert, LLP

Palo Alto, CA · 94304

650-813-4865

Richard La

Reg. 73989

Patent agent

San Francisco, CA · 94159

415-830-3368

Trang La

Reg. 50863

Patent attorney

Oakland, CA · 94612

510-508-7093

F David La Riviere

Reg. 27207

Patent attorney

LaRiviere Grubman & Payne LLP

Monterey, CA · 93942

831-649-8800

Katherine R LaBarre

Reg. 64645

Patent attorney

Kaye Scholer LLP

Palo Alto, CA · 94306-2112

650-319-4512

Catherine C Lacavera

Reg. 59830

Patent attorney

Google Inc.

Mountain View, CA · 94040

650-253-0000

Mary Elizabeth Lachman

Reg. 29232

Patent agent

Playa Del Rey, CA · 90293

310-822-3548

Michael Bruce Lachuk

Reg. 31536

Patent attorney

The Law Office of Mike Lachuk

La Jolla, CA · 92038

858-405-0173

Jayshali Lad

Reg. 79604

Patent agent

Belmont, CA · 94002

650-228-3570

Sonya P. Lad

Reg. 68378

Patent agent

Carlsbad, CA · 92009

858-245-0991

Lindsay A. Laddaran

Reg. 79108

Patent attorney

Lindsay Laddaran

Irvine, CA · 92614

949-721-2893

Richard M Ladden

Reg. 28095

Patent attorney

Milpitas, CA · 95035

408-262-5993

Amy Lafer

Reg. 79123

Patent attorney

San Diego, CA · 92131

619-772-0041

Fernanda Lago Arroyo

Reg. 81911

Patent agent

Redwood City, CA · 94063

954-439-2352

Karim Lagobi

Reg. 63908

Patent agent

Rancho Palos Verdes, CA · 90275

310-435-0083

Peter Leonard Lagus

Reg. 29665

Patent agent

Lagus Applied Technology, Inc.

Escondido, CA · 92029

760-480-1290

Amy S Lai

Reg. 57245

Patent agent

Montebello, CA · 90640

310-601-8568

Geneva A. Lai

Reg. 72910

Patent attorney

Haley Guiliano LLP

San Jose, CA · 95113

669-213-1082

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.