California

Patent attorneys in California

California hosts 9,567 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 Durie Tangri LLP, Viasat, Inc., and Thendor Therapeutics, Inc..

Top cities in California

All practitioners in California

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

James B. Gaffney· III

Reg. 74275

Patent attorney

San Jose, CA · 95126

707-217-5604

Susannah Melanie Lynn Gagnon

Reg. 800118

Limited recognition

Munger, Tolles & Olson LLP

San Francisco, CA · 94105

415-512-4098

Roger S Gaither

Reg. 27273

Patent attorney

Law Offices of Roger S Gaither

San Ramon, CA · 94583

925-829-5577

Nadia Galash

Reg. 71460

Patent attorney

San Diego, CA · 92127

858-776-9177

Kevin C. Gale

Reg. 76547

Patent attorney

Life Technologies Corporation

Carlsbad, CA · 92008

484-981-0703

Jennifer J Galela

Reg. 74501

Patent attorney

Haley Guiliano LLP

San Jose, CA · 95113

669-213-1083

Dennis R Gallagher

Reg. 42563

Patent attorney

Haynes and Boone, LLP

Costa Mesa, CA · 92626

949-202-3079

Laura L Gallagher

Reg. 52222

Patent agent

Levine Bagade Han LLP

Palo Alto, CA · 94303

650-242-4211

Mark J Gallagher

Reg. 43622

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Peter A Gallagher

Reg. 47584

Patent attorney

Vierra Magen Marcus LLP

San Francisco, CA · 94105

415-489-4130

Thomas Allen Gallagher

Reg. 24815

Patent agent

Santa Barbara, CA · 93160

415-989-5430

Megan M Gallant

Reg. 65960

Patent attorney

Aikin & Gallant LLP

los altos, CA · 94022

415-505-2671

Michelle S Gallardo

Reg. 66265

Patent agent

Chula Vista, CA · 91915

858-401-2670

Anne-Marie L Gallegos

Reg. 67502

Patent agent

San Jose, CA · 95125

408-506-7833

Hector G Gallegos

Reg. 40614

Patent attorney

Morrison & Foerster LLP

Los Angeles, CA · 90013

213-892-5200

Mavis S Gallenson

Reg. 32464

Patent attorney

Ladas and Parry

Los Angeles, CA · 90036

323-934-2300

William S Galliani

Reg. 33885

Patent attorney

Cooley LLP

Palo Alto, CA · 94304-1130

650-843-5622

Nicholas Folino Gallo

Reg. 50135

Patent attorney

Chevron Corporation

San Ramon, CA · 94583-2324

925-842-6407

Francis Vincent Gallucci· Jr.

Reg. 79134

Patent agent

CIONCA IP Law, P.C.

Irvine, CA · 92614

949-334-3036

Karen Kirk Galoyan

Reg. 79135

Patent attorney

Phil IP Law

Pasadena, CA · 91101

818-858-2929

James R. Gambale· Jr.

Reg. 66052

Patent attorney

Encinitas, CA · 92024

858-212-5046

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?

9,567 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.