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 Adeia, Inc., Sony Corporation of America, and Cytomx Therapeutics, Inc..

Top cities in California

All practitioners in California

Michael A Fuerch

Reg. 68153

Patent attorney

Adeia, Inc.

San Jose, CA · 10595

408-473-2500

Harold T Fujii

Reg. 38458

Patent attorney

Sony Corporation of America

San Jose, CA · 95112

408-352-4540

Sharon M Fujita

Reg. 38459

Patent attorney

Cytomx Therapeutics, Inc.

South San Francisco, CA · 94080

650-825-5320

Lori K Fujitake

Reg. 46712

Patent agent

Fujitake Law Offices

Santa Clara, CA · 95105

408-732-7021

Tomohisa Fujiwara

Reg. 80143

Patent agent

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

858-707-4210

Sandra S Fujiyama

Reg. 46713

Patent attorney

Wilson Sonsini Goodrich & Rosati, P.C.

Los Angeles, CA · 90071

323-210-2903

Juri Yasuko Fukuda

Reg. 63091

Patent agent

Piedmont, CA · 94611

510-655-7519

Anthony T Fulcher

Reg. 50284

Patent attorney

Santa Clara Valley Water District

San Jose, CA · 95118

408-265-2600

Alyson C Fuller

Reg. 61844

Patent agent

Prolacta Bioscience

City of Industry, CA · 91746

773-351-0337

John R Fuller

Reg. 80851

Patent agent

Palo Alto, CA · 94304

650-838-4405

Mary A Fuller

Reg. 45480

Patent attorney

Lincoln Law School of San Jose

San Jose, CA · 95113

650-654-3400

Michael L Fuller

Reg. 36516

Patent attorney

Knobbe, Martens, Olson & Bear LLP

Irvine, CA · 92614

858-707-4000

Renee C. Fuller

Reg. 73220

Patent attorney

Bristol Myers Squibb

Brisbane, CA · 94005

650-420-6254

Susan B Fuller

Reg. 51979

Patent agent

Poway, CA · 92064

858-229-2400

Thomas J. Fuller

Reg. 74439

Patent attorney

Kilpatrick Townsend & Stockton LLP

Menlo Park, CA · 94025

650-324-6357

Daniel C. Fullerton

Reg. 69773

Patent attorney

La Crescenta, CA · 91214

303-548-6449

Christine A Fung

Reg. 36141

Patent agent

Rancho Palos Verdes, CA · 90274

310-524-9113

Hei T Fung

Reg. 71291

Patent agent

Fremont, CA · 94538

408-838-2757

Foojan Funk

Reg. 62221

Patent agent

San Rafael, CA · 94903

415-299-9656

Robert E Furlani

Reg. 76492

Patent attorney

Ligand Pharmaceuticals Incorporated

San Diego, CA · 92121

716-359-6354

Eric S Furman

Reg. 45664

Patent attorney

Knobbe, Marten, Olson & Bear, LLP

Irvine, CA · 95401

979-760-0404

Joshua D. Furman

Reg. 70861

Patent attorney

Durie Tangri LLP

San Francisco, CA · 94111

415-362-6666

Ryan S. Furtado

Reg. 76775

Patent attorney

Viasat, Inc.

Carlsbad, CA · 92009

760-476-7458

Shelley P M Fussey

Reg. 39458

Patent agent

Thendor Therapeutics, Inc.

Irvine, CA · 92617

713-614-0001

Joseph C Gabaeff

Reg. 59299

Patent agent

Adeli & Tollen, LLP

Los Angeles, CA · 90049

310-442-9300

Michael T Gabrik

Reg. 32896

Patent attorney

Texas Instruments Incorporated

Santa Clara, CA · 95054

669-721-3005

Jennifer Gadberry-Hadrys

Reg. 59813

Patent agent

Ventura, CA · 93001

805-667-2163

Sanjay S Gadkari

Reg. 55796

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-783-9599

Cassandra L Gaedt

Reg. 69207

Patent attorney

Gibson Dunn and Crutcher

Los Angeles, CA · 90071

213-229-7353

Clay E Gaetje

Reg. 37831

Patent attorney

Kudelski Group

Mountain View, CA · 94043

650-962-2261

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.