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 Apple Inc., LOZA & LOZA, LLP, and Cozen O'Connor.

Top cities in California

All practitioners in California

Helene Plotka Workman

Reg. 35981

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-974-5081

Eugene R. Worley

Reg. 47186

Patent attorney

LOZA & LOZA, LLP

Upland, CA · 91786

714-453-9824

Regis C Worley· Jr.

Reg. 58430

Patent attorney

Cozen O'Connor

San Diego, CA · 92101

619-685-1717

Erica Jade Worthington

Reg. 50910

Patent attorney

Redwood City, CA · 94061

650-533-6008

Donna C Wortman

Reg. 56089

Patent agent

Solvang, CA · 93463

805-691-9513

Colin S Wright

Reg. 57202

Patent attorney

Stryker

Palm Springs, CA · 92264

404-210-6050

Daniel D Wright

Reg. 75092

Patent agent

Pleasanton, CA · 94566

925-922-0176

David G Wright

Reg. 69932

Patent agent

IPValue Management

SANTA CLARA, CA · 95054

858-354-3030

Edward S Wright

Reg. 24903

Patent attorney

Law Offices of Edward S. Wright

Menlo Park, CA · 94025

650-330-0830

Jerry G Wright

Reg. 20165

Patent attorney

San Francisco, CA · 94122

415-664--5338

Kenneth R Wright

Reg. 48046

Patent attorney

Robert W. Hicks & Associates

San Diego, CA · 92101

619-846-4333

Kenneth Duane Wright

Reg. 53795

Patent agent

Martine and Penilla LLP

Sunnyvale, CA · 94085

408-749--6900 X 6914

William H Wright· III

Reg. 36312

Patent attorney

Hermosa Beach, CA · 90254

310-962-5932

Andrea J. Wu

Reg. 75293

Patent attorney

Los Angeles Superior Court

Los Angeles, CA · 90012

213-633-4958

Andrew J Wu

Reg. 43292

Patent attorney

Morgan, Lewis & Bockius LLP

Palo Alto, CA · 94306

650-843-4000

Andrew C Wu

Reg. 68927

Patent attorney

Albany, CA · 94706

814-422-5155

Bruce Y C Wu

Reg. 73447

Patent attorney

Frost Brown Todd LLP

San Francisco, CA · 94104

415-857-8310

Charles C H Wu

Reg. 39081

Patent attorney

Charles C.H. Wu & Associates PC

Irvine, CA · 92618

949-251-0111 X-118

Chih-Yun Wu

Reg. 69082

Patent agent

Cooley LLP

Palo Alto, CA · 94304-1130

650-843-5000

Claude T. Wu

Reg. 82412

Patent agent

Monrovia, CA · 91016

626-427-7241

Cynthia F Wu

Reg. 75012

Patent agent

Fremont, CA · 94538

626-320-7230

Dandan Wu

Reg. 53797

Patent agent

Sunnyvale, CA · 94087

408-617-0835

Daniel H. Wu

Reg. 62268

Patent attorney

Mattel, Inc.

El Segundo, CA · 90245

310-252-4411

David W. Wu

Reg. 66351

Patent attorney

Baker Botts

Palo Alto, CA · 94304

650-739-7552

Elise Y. Wu

Reg. 81820

Patent attorney

San Francisco, CA · 94158-1526

781-738-2022

Emily Tongco Wu

Reg. 46473

Patent attorney

Genomics Institute Of The Novartis Research Foundation

San Diego, CA · 92121

858-812-1539

Eric W Wu

Reg. 63824

Patent attorney

San Francisco, CA · 94118

415-300-0398

Fang Wu

Reg. 62058

Patent agent

Townsend and Townsend and Crew LLP

Palo Alto, CA · 94301

650-326-2400

Hao Wu

Reg. L1347

Limited recognition

Exelixis, Inc.

Alameda, CA · 94502

650-837-7675

Henry P Wu

Reg. 44412

Patent attorney

Amgen, Inc.

Thousand Oaks, CA · 91320

805-447-0781

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.