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 Ascenta Therapeutics, Inc., Unity Technologies, and Wilson, Sonsini, Goodrich & Rosati.

Top cities in California

All practitioners in California

Carl J Wheeler

Reg. 55726

Patent agent

Ascenta Therapeutics, Inc.

San Diego, CA · 92130

858-436-1245

Cyndi M Wheeler

Reg. 58156

Patent attorney

Unity Technologies

San Francisco, CA · 94103

916-521-6030

Matthew C. Wheeler

Reg. 73101

Patent attorney

Wilson, Sonsini, Goodrich & Rosati

San Diego, CA · 92130-3002

858-350-2317

Eugene T Wheelock

Reg. 28825

Patent attorney

Palo Alto, CA · 94306

650-302-6286

Nicholas J. Whilt

Reg. 72081

Patent attorney

O'Melveny & Myers, LLP

Los Angeles, CA · 90071

213-430-7503

Emily M Whitcher

Reg. 74839

Patent attorney

Gibson, Dunn & Crutcher

Irvine, CA · 92612

214-629-6700

Damien E. White

Reg. 69990

Patent agent

San Diego, CA · 92110

321-316-6135

Douglas E White

Reg. 30435

Patent attorney

Acronational Trademark Law Firm

Alameda, CA · 94501

925-255-3564

Elspeth S White

Reg. 62133

Patent attorney

Google Inc.

Mountain View, CA · 94043

650-253-1519

George P. White

Reg. 62267

Patent agent

George P. White

Long Beach, CA · 90814-1857

562-897-1155

Henry D. White

Reg. 78614

Patent agent

Laguna Beach, CA · 92651

949-322-2090

Justin A White

Reg. 48883

Patent attorney

Schwegman Lundberg & Woessner, P.A.

San Jose, CA · 95113

612-373-6900

Kevin S White

Reg. 69821

Patent attorney

P&P Imports LLC

Irvine, CA · 92614

650-488-8270

Lindsay M White

Reg. 59464

Patent attorney

Paul Hastings

Palo Alto, CA · 94304

650-320-1800

Scott R White

Reg. 52451

Patent attorney

San Diego, CA · 92129

858-780-2761

Todd R White

Reg. 62505

Patent agent

Mountain View, CA · 94041

Wendy A Whiteford

Reg. 36964

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320

805-447-1008

Andrew P. Whitehead

Reg. 62447

Patent attorney

Genentech

South San Francisco, CA · 94080-4918

650-225-3536

Matthew S. Whitehead

Reg. 82924

Patent attorney

Knobbe Martens Olson and Bear

Irvine, CA · 92614

206-405-2041

Eric J Whitesell

Reg. 38657

Patent agent

San Diego, CA · 92130

858-776-3597

Michael A Whitfield

Reg. 40271

Patent agent

San Francisco, CA · 94115

415-235-3369

Adam K Whiting

Reg. 44400

Patent attorney

FisherBroyles LLP

Oakland, CA · 94619

650-275-4869

Noel Benjamin Whitley

Reg. 42225

Patent attorney

Broadcom Corporation

Irvine, CA · 92619

949-926-6514

Reeta K Whitney

Reg. 50647

Patent attorney

Varian Medical Systems, Inc.

Palo Alto, CA · 94304

650-424-5066

Jayna R Whitt

Reg. 47175

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-974-4262

Michael A Whittaker

Reg. 46230

Patent attorney

San Diego, CA · 92127

619-203-3186

Anthony Travis Whittington

Reg. 54871

Patent attorney

IdeaParlor Legal P.C.

Oceanside, CA · 92056

415-610-3799

Randall G Wick

Reg. 29712

Patent attorney

Costa Mesa, CA · 92626

714-549-8380

Paul A Wickman

Reg. 61242

Patent attorney

Ultragenyx Pharmaceutical Inc.

Novato, CA · 94949

415-475-8119

Cynthia A Wickstrom

Reg. 50897

Patent attorney

Orrick Herrington and Sutcliffe LLP

Menlo Park, CA · 94025

650-614-

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.