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 Zilka-Kotab, PC, Dolby Laboratories, Inc., and Venable, LLP.

Top cities in California

All practitioners in California

Ronald Brian Feece

Reg. 46327

Patent attorney

Zilka-Kotab, PC

San Jose, CA · 95172-1120

408-971-2573

James F Feeney

Reg. 45538

Patent attorney

Santa Clara, CA · 95051

Joanne L Feeney

Reg. 35134

Patent attorney

Nipomo, CA · 93444

000-000-0000

Jeffrey A Fehervari

Reg. 40603

Patent attorney

Dolby Laboratories, Inc.

San Francisco, CA · 94103

415-645-5000

Maximilian Y Fei

Reg. 77043

Patent attorney

San Francisco, CA · 94105

415-268-7897

Deborah A. Feinblum

Reg. 59641

Patent attorney

Venable, LLP

Los Angeles, CA · 90067

310-229-9663

Aryeh N Feinstein

Reg. 74752

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

202-640-6423

Michael J. Feirstein

Reg. 75948

Patent attorney

Costa Mesa, CA · 92626

000-000-0000

Thomas C Feix

Reg. 34592

Patent attorney

Procopio, Cory, Hargreaves & Savitch LLP

PALO ALTO, CA · 94612

650-645-9016

Nathan L. Feld

Reg. 59725

Patent agent

Nicholson De Vos Webster & Elliott LLP

San Jose, CA · 95113

408-471-3057

Jason S Feldmar

Reg. 39187

Patent attorney

Gates and Cooper LLP

Hermosa Beach, CA · 90254

310-641-8797

David C Feldmeier

Reg. 55901

Patent agent

Twin Dolphin Software, Inc.

Redwood City, CA · 94065

650-352-5700

John Ford Feldsted

Reg. 30257

Patent attorney

John F. Feldsted

Beverly Hills, CA · 90210

310-363-0909

Victor M Felix-Perez

Reg. 53906

Patent attorney

Procopio Cory Hargreaves and Savitch LLP

San Diego, CA · 92101

619-238-1900

Jonae C Felton

Reg. 74330

Patent attorney

Mercedes-Benz Research and Development North America

Long Beach, CA · 90810

562-972-4996

Mary E Femmel

Reg. 55169

Patent attorney

MEDLEN & CARROLL, LLP

San Francisco, CA · 94103

415-957-5935

Chung L Feng

Reg. 29793

Patent agent

Mill Valley, CA · 94941

415-380-8722

Michael Cheng Feng

Reg. 72139

Patent attorney

Intuitive Surgical Inc

Sunnyvale, CA · 94086

408-523-1826

Paul Y Feng

Reg. 35510

Patent attorney

ONE LLP

Newport Beach, CA · 92660

949-444-5677

Tao Feng

Reg. 56900

Patent attorney

Mountain View, CA · 94040

650-452-4699

Sharon Nalani Fennessy

Reg. 33520

Patent agent

Fennessy Engineering

Newport Beach, CA · 92663

714-964-5441

Christian Fenton

Reg. 65311

Patent attorney

San Diego, CA · 92122

808-349-2994

James R Fenton

Reg. 75480

Patent agent

Hermosa Beach, CA · 90254

310-844-2912

John F Ferdon

Reg. 58409

Patent agent

San Francisco, CA · 94116

415-665-2700

Babak Fereidouni

Reg. 58928

Patent agent

San Diego, CA · 92122

215-356-8867

Ivy H. C. Fernandes

Reg. 84568

Patent agent

Morrison & Foerster LLP

San Diego, CA · 92130-3588

858-720-5108

Dennis S Fernandez

Reg. 34160

Patent attorney

Fernandez & Associates, LLP

Atherton, CA · 94027

650-329-4999

Maria G. Fernandez

Reg. 84646

Patent attorney

Biegel Law Firm

Monterey, CA · 93940

831-373-3700

Michael M Fernandez

Reg. 50768

Patent attorney

Carlsbad, CA · 92009

760-822-8980

Amedeo F Ferraro

Reg. 37129

Patent attorney

Martin & Ferraro, LLP

Los Angeles, CA · 90064

310-286-9800

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.