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 Kokka & Backus, PC, Benman Brown & William, and Cooley LLP.

Top cities in California

All practitioners in California

Patrick O Benito

Reg. 71790

Patent attorney

Kokka & Backus, PC

San Francisco, CA · 94111

650-566-9925

William J Benman· Jr

Reg. 29014

Patent attorney

Benman Brown & William

Los Angeles, CA · 90067

310-779-6013

David T Bennett

Reg. 75931

Patent attorney

Escondido, CA · 92027

619-354-9181

Lawrence A Bennett

Reg. 54772

Patent attorney

Benicia, CA · 94510

925-788-1271

Nitasha R. Bennett

Reg. 81166

Patent agent

Cooley LLP

San Diego, CA · 92121

858-550-6480

Frederick N Bens

Reg. 52612

Patent agent

Bens Consulting

Livermore, CA · 94550

925-443-6727

Rory G Bens

Reg. 44028

Patent attorney

Bens IP Consulting

San Leandro, CA · 94577

510-427-8727

Joseph P. Benson

Reg. 61794

Patent agent

JBenson Consulting PC

Sacramento, CA · 95816

530-323-9700

Joshua C Benson

Reg. 54692

Patent attorney

RuyakCherian LLP

Berkeley, CA · 94704

510-613-4960

Jay H Bentley

Reg. 69203

Patent agent

Campbell, CA · 95008

408-236-6638

Mark I. Bentley

Reg. 60460

Patent attorney

McDermott Will & Emery LLP

Irvine, CA · 92614

949-851-0633

Ariel S Bentolila

Reg. 52614

Patent agent

Bay Area I. P. Group, LLC

San Francisco, CA · 94121-0459

415-515-3005

Stephen K. Benyi

Reg. 64966

Patent attorney

Match Group Americas, LLC

Palo Alto, CA · 94301

480-235-6229

William H Benz

Reg. 25952

Patent attorney

Palo Alto, CA · 94301

650-328-4221

Jessica L Benzler

Reg. 73137

Patent attorney

Fenwick & West LLP

Mountain View, CA · 94041

650-335-7279

James T Beran

Reg. 31090

Patent attorney

Montara, CA · 94037

804-314-6182

Paul M. Berard

Reg. 59715

Patent agent

Napa, CA · 94558

707-257-8117

Sharon A Beresford

Reg. 52615

Patent agent

Ambrx, Inc

La Jolla, CA · 92037

858-875-2447

Bradley J Bereznak

Reg. 33474

Patent attorney

The Law Offices of Bradley J. Bereznak

Mountain View, CA · 94040

408-530-9663

Neal Berezny

Reg. 56030

Patent agent

Los Gatos, CA · 95033

408-872-0793

Michael N Berg

Reg. 32195

Patent attorney

Regard IP Law

San Francisco, CA · 94104

415-398-9600

Richard P Berg

Reg. 28145

Patent attorney

Ladas and Parry

Los Angeles, CA · 90036

323-934-2300

Markus Bergauer

Reg. 74328

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320-1799

805-447-6504

Emily A Berger

Reg. 51459

Patent attorney

Net Flix

Los Gatos, CA · 95032

408-540-2262

Jeanne S Berges

Reg. 50361

Patent attorney

Malibu, CA · 90265

310-456-2393

Denise S Bergin

Reg. 50581

Patent attorney

Weaver Austin Villeneuve & Sampson LLP

Oakland, CA · 94607

510-663-1100

Michelle G Bergman

Reg. 54124

Patent agent

K&L Gates LLP

Irvine, CA · 92614

949-253-0900

Ami J Bergstrom

Reg. 50324

Patent attorney

Stonyford, CA · 95979

707-472-6974

James T Bergstrom

Reg. 57021

Patent agent

Kilpatrick Townsend & Stockton, LLP

Denver, CA · 80202

303-571-4000

Keren A. Berguig

Reg. 72035

Patent agent

Andrews Kurth Kenyon LLP

Palo Alto, CA · 94304

650-384-4653

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.