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 Francis Law Group, Glidewell Laboratories, and Ashurst Perkins Coie US LLP.

Top cities in California

All practitioners in California

Charles C Fowler

Reg. 39675

Patent attorney

Glidewell Laboratories

Irvine, CA · 92612

949-399-1763

Colin M Fowler

Reg. 64379

Patent attorney

Ashurst Perkins Coie US LLP

Palo Alto, CA · 94304-1212

650-838-4725

Sarah E Fowler

Reg. 54854

Patent attorney

Paul, Hasting, Janofsky & Walker LLP

Palo Alto, CA · 94304-1106

650-320-1861

George L Fox

Reg. 64145

Patent attorney

Berkeley Lights, Inc.

Emeryville, CA · 94608

510-858-2855

James A Fox

Reg. 38455

Patent attorney

Corcept Therapeutics, Inc.

Menlo Park, CA · 94025

650-327-3270

Robert J Fox

Reg. 27635

Patent attorney

Yucca Valley, CA · 92286-2096

714-309-2330

Stephen P Fox

Reg. 22944

Patent attorney

Half Moon Bay, CA · 94019

650-868-7740

Thomas J Fox

Reg. 77576

Patent agent

Qualcomm

San Diego, CA · 92121

858-587-1121

Jordan J Fraboni

Reg. 80881

Patent attorney

Palo Alto, CA · 94306

856-745-3204

Tamara D Fraizer

Reg. 51699

Patent attorney

Squire Patton Boggs (US) LLP

Palo Alto, CA · 94304

650-856-6500

Rahjima R Francia

Reg. 76812

Patent agent

Kubota & Basol LLP

Los Angeles, CA · 90071

213-462-2618

Carol L Francis

Reg. 36513

Patent attorney

Bozicevic, Field & Francis LLP

Redwood City, CA · 94065

650-327-3400

Derek S Francis

Reg. 75460

Patent agent

Francis Law Group

Alameda, CA · 94501

510-523-6200

Ralph C Francis

Reg. 38884

Patent attorney

Francis Law Group

Alameda, CA · 94501

510-523-6200

Yaiza Grace Franco

Reg. 902928

Limited recognition

University of San Diego School of Law

San Diego, CA · 92110

Christopher M Franich

Reg. 69414

Patent attorney

Snell & Wilmer L.L.P.

San Diego, CA · 92122

305-523-9357

Cheryl L Franke

Reg. 44113

Patent attorney

Kudelski Group

San Francisco, CA · 94111

650-759-6421

Darren M Franklin

Reg. 51701

Patent attorney

Sheppard, Mullin, Richter & Hampton LLP

Los Angeles, CA · 90071-1448

213-620-1780

Eustace B Franklin

Reg. 34334

Patent agent

Eufra Patent Serivces

Redondo Beach, CA · 90278

424-241-0093

Ross Lee Franks· Jr

Reg. 47233

Patent attorney

Rancho Santa Fe, CA · 92067-5981

858-792-3404

Keith D Fraser

Reg. 47575

Patent attorney

The Fraser Firm, P.C.

Rancho Mirage, CA · 92270

213-864-1395

Stephen D. Frausto

Reg. 76135

Patent attorney

Morrison & Foerster LLP

Palo Alto, CA · 94304

650-813-6496

Jeffery D Frazier

Reg. 34601

Patent attorney

Jeffery D. Frazier, Esq.

San Francisco, CA · 94120-7775

650-275-2112

Kenneth M Frazier

Reg. 69471

Patent attorney

Mophie LLC

Tustin, CA · 92780

949-407-8477

Milton M Frazier

Reg. 44687

Patent attorney

Sony Corporation of America

San Diego, CA · 92127

858-942-1325

Paul L Frech

Reg. 82610

Patent agent

Haley Guiliano LLP

San Jose, CA · 95113

669-213-1081

Marc J Frechette

Reg. 49060

Patent attorney

Rockley Photonics, Inc.

Irvine, CA · 92612

714-458-2571

Charles E Fredericks

Reg. 51703

Patent attorney

Inskeep Intellectual Property Group, Inc.

Torrance, CA · 90504

310-755-7800

Kurt David Fredrickson

Reg. 77281

Patent attorney

Desmarais LLP

San Francisco, CA · 94710

415-573-1928

Deborah M. H. Freeland

Reg. 58208

Patent attorney

Stanford Law School

Stanford, CA · 94305

650-736-9643

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.