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 Taylor Made Adidas Golf, Amgen Inc., and Amgen, Inc.,.

Top cities in California

All practitioners in California

Louis B Tran

Reg. 56459

Patent attorney

Taylor Made Adidas Golf

Carlsbad, CA · 92008

720-476-5788

Mui A Tran

Reg. 80255

Patent agent

Amgen Inc.

Thousand Oaks, CA · 91320-1789

805-881-8389

Paul B Tran

Reg. 41565

Patent agent

Amgen, Inc.,

Thousand Oaks, CA · 91320

805-447-9768

Tam Q Tran

Reg. 68959

Patent attorney

San Ramon, CA · 94582

925-577-7228

Tam-Tammy T. Tran

Reg. 80475

Patent agent

San Diego, CA · 92037

608-896-2871

Thi N Tran

Reg. 77976

Patent agent

Kilpatrick Townsend and Stockton

San Francisco, CA · 94111

415-273-4718

Linda Trang

Reg. 53700

Patent attorney

Linda Trang Vu

Huntington Beach, CA · 92647

949-698-2433

Milanka L Trang

Reg. 80718

Patent agent

San Diego, CA · 92101

480-785-6796

Nicholas R. Transier

Reg. 68743

Patent attorney

Dinsmore & Shohl LLP

San Diego, CA · 92101

619-400-0464

Edward S Trask

Reg. 38635

Patent agent

Newport Corporation

Irvine, CA · 92606

949-466-5773

Katarzyna Trauben

Reg. 68457

Patent attorney

Pacific Palisades, CA · 90272

786-797-1199

Julie J Travers

Reg. 58107

Patent attorney

Wagner Blecher LLP

Watsonville, CA · 95076

408-377-0500

Basil B Travis

Reg. 31711

Patent attorney

Lodi, CA · 95241

209-333-8379

Jeffrey A Travis

Reg. 53701

Patent attorney

Bakersfield, CA · 93312

661-472-1363

Barbara Treash-Osio

Reg. 54499

Patent agent

Chula Vista, CA · 91913

619-482-4706

Richard F Trecartin

Reg. 31801

Patent attorney

Morgan, Lewis & Bockius LLP

San Francisco, CA · 94105

415-442-1255

Thomas L Treffert

Reg. 48279

Patent attorney

Law Office of Thomas L. Treffert

San Francisco, CA · 94107

415-830-6420

Mark A Treitel

Reg. 52298

Patent attorney

Quinn Emanuel Urquhart Oliver & Hedges, LLP

Los Angeles, CA · 90017

213-443-3866

Allen R Tremain

Reg. 40207

Patent agent

National Semiconductor

Santa Clara, CA · 95052

408-721-2866

Michael H Trenholm

Reg. 37743

Patent attorney

Knobbe Martens Olson & Bear, LLP

Palo Alto, CA · 94303

650-752-1100

Edward J Treska

Reg. 37744

Patent attorney

Acacia Research

Newport Beach, CA · 92660

949-480-8300

Alexander R Trimble

Reg. 52301

Patent attorney

Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.

San Francisco, CA · 94104

415-432-6018

Mark S. Trimmer

Reg. 77676

Patent agent

Ridgeside Consulting LLC

Monrovia, CA · 91016

626-824-8797

Kimberly K Trinkaus

Reg. 63784

Patent agent

La Verne, CA · 91750

909-596-7512

Mark W Triplett

Reg. 49002

Patent attorney

Sonos

Santa Barbara, CA · 93101

805-965-3001

Paul D Tripodi· II

Reg. 40847

Patent attorney

Akin Gump Strauss Hauer & Feld

Irvine, CA · 92614-2585

949-885-4100

Hans R Troesch

Reg. 36950

Patent attorney

Redwood City, CA · 94063-1691

650-260-8082

R Joseph Trojan

Reg. 34264

Patent attorney

Trojan Law Offices

Beverly Hills, CA · 90212

310-777-8399

Michael F Trombetta

Reg. 77756

Patent attorney

Quinn Emanuel Urquhart & Sullivan, LLP

San Francisco, CA · 94111

415-875-6600

Soodabeh Tronson

Reg. 41354

Patent attorney

Woodside, CA · 94062

866-325-7964

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.