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 Wilson Sonsini Goodrich & Rosati, Knobbe, Martens, Olson & Bear, LLP, and Nicholson De Vos Webster & Elliott LLP.

Top cities in California

All practitioners in California

Adam C Stone

Reg. 60531

Patent attorney

Nicholson De Vos Webster & Elliott LLP

San Jose, CA · 95113

408-471-1952

Paul A Stone

Reg. 38628

Patent attorney

5AM Venture Management LLC

Menlo Park, CA · 94025

650-233-8607

Aaron J. Stonehocker

Reg. 75960

Patent attorney

PLW

Los Altos, CA · 94022

650-440-6537

Kimberly S Stopak

Reg. 66747

Patent attorney

Wilson, Sonsini, Goodrich & Rosati

Palo Alto, CA · 94304

415-572-4518

John R Storella

Reg. 32944

Patent attorney

Storella Law Group

Berkeley, CA · 94705

510-501-0567

Claire M. Storey

Reg. 83025

Patent agent

Wilson Sonsini Goodrich & Rosati

Los Angeles, CA · 90067

704-999-7207

Jason M Stotter

Reg. 71688

Patent agent

Polygon IP LLP

Walnut Creek, CA · 94597

650-226-4351

Donald E Stout

Reg. 34493

Patent attorney

Stout, Uxa & Buyan, LLP

Laguna Hills, CA · 92653

949-450-1750

Kelsey M Stout

Reg. 71704

Patent attorney

Bakersfield, CA · 93304

415-676-0650

Maria V. Stout

Reg. 57571

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

858-707-4000

Joshua J. Stowell

Reg. 64096

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-760-9562

Joseph Lawrence Strabala

Reg. 22464

Patent attorney

Law Office Of Joseph L Strabala

San Francisco, CA · 94111

415-981-8083

Elaine C Stracker

Reg. 43166

Patent attorney

Berkeley, CA · 94705

510-665-3014

Catherine Ashley Straight

Reg. 45521

Patent attorney

Catherine Ashley Straight Attorney

Wilton, CA · 95693

916-444-5444

Craig W. Straub

Reg. 64123

Patent attorney

San Diego, CA · 92109

858-344-0674

David G Streeter

Reg. 43168

Patent agent

Penn Valley, CA · 95946

530-432-3388

Tom Streeter

Reg. 32007

Patent attorney

Patent Attorney

San Clemente, CA · 92674

949-668-3468

Mary A Stretch

Reg. 44361

Patent attorney

Irvine, CA · 92620

858-922-2229

Kristen H Strickland

Reg. 80757

Patent attorney

Invoke IP, P.C.

Danville, CA · 94526

631-836-0654

Romualdas Strimaitis

Reg. 35697

Patent attorney

Yahoo

Sunnyvale, CA · 94089

650-269-3480

Elizabeth E Strnad

Reg. 26667

Patent agent

San Mateo, CA · 94402

650-343-8484

Duangkamol K. Strohl

Reg. 64580

Patent agent

Clovis, CA · 93619

925-400-3237

Jacqueline Diane Stroncek

Reg. 72619

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3293

Katie L. Strong

Reg. 76442

Patent agent

Squire Patton Boggs

San Francisco, CA · 94111

415-393-9874

Lauren J. Strosnick

Reg. 70261

Patent attorney

Cooley LLP

Palo Alto, CA · 94304-1130

650-843-5065

Nissa M Strottman

Reg. 52257

Patent attorney

Visa

Foster City, CA · 94404

650-432-2026

Jonathan R. K. Stroud

Reg. 72518

Patent attorney

Unified Patents, Inc.

Los Altos, CA · 94022

202-805-8931

Scott M Stroupe

Reg. 64009

Patent attorney

San Francisco, CA · 94102

206-437-1923

Brandon H Stroy

Reg. 73166

Patent attorney

Los Altos, CA · 94024

650-380-0434

Daniel Strugar

Reg. 29868

Patent attorney

Santee, CA · 92071

619-258-9750

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.