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 University of San Francisco School of Law, Kramer Levin Neftalis & Frankel LLP, and Impossible Foods.

Top cities in California

All practitioners in California

Stefanie S Valentini

Reg. 52311

Patent attorney

San Diego, CA · 92130

619-977-5299

Alyssa Vallero

Reg. 900315

Limited recognition

University of San Francisco School of Law

San Francisco, CA · 94117-1080

530-848-5758

Alan Valukonis

Reg. 38640

Patent agent

Rancho Palos Verdes, CA · 90275

310-541-0137

Reborn Van

Reg. 67198

Patent agent

Norwalk, CA · 90650

562-761-8546

Andrew M Van Court

Reg. 48506

Patent attorney

Kramer Levin Neftalis & Frankel LLP

Cupertino, CA · 95014

408-973-7833

William E. Van Curen

Reg. 67759

Patent attorney

Impossible Foods

Redwood City, CA · 94063

602-644-9886

Korbin S Van Dyke

Reg. 52313

Patent agent

Sunol, CA · 94586

925-862-0665

Benjamin Francois Jean Van Espen

Reg. 82840

Patent agent

Jones Day

San Diego, CA · 92121

858-703-3125

Alexander Van Gaalen

Reg. 62131

Patent attorney

Alexander van Gaalen

Culver City, CA · 90230

310-363-0210

Edward A Van Gieson

Reg. 44386

Patent attorney

Patent Law Works LLP

San Jose, CA · 95131

650-537-4507

Katherine J Van Gunst

Reg. 63332

Patent agent

San Diego, CA · 92117

425-736-2312

Joshua Voight Van Hoven

Reg. 56786

Patent attorney

Van Hoven PC

San Ramon, CA · 94583

925-302-5941

John D van Loben Sels

Reg. 59131

Patent attorney

Dechert LLP

Mountain View, CA · 94040-1499

650-813-4871

Michael D Van Loy

Reg. 52315

Patent agent

Mintz, Levin, Cohn, Ferris, Glovsky,

San Diego, CA · 92130

858-314-1500

Brian T Van Osdol

Reg. 67370

Patent agent

Alpine Patents LLC

Piedmont, CA · 94611

417-860-4397

Lee G Van Pelt

Reg. 38352

Patent attorney

Van Pelt and Yi LLP

Cupertino, CA · 95014

408-973-2590

Aaron C. Van Stralen

Reg. 70415

Patent agent

Orange County District Attorney's Office

Santa Ana, CA · 92701

714-834-3600

Norman R. Van Treeck

Reg. 60647

Patent attorney

Pasadena Legal Group

Landers, CA · 92285

323-573-3229

Nico J van Waes

Reg. 61828

Patent agent

Nokia

Sunnyvale, CA · 94085

214-499-2606

Thomas A. Van Zandt

Reg. 43219

Patent agent

Blakely, Sokoloff, Taylor &Zafman

Sunnyvale, CA · 94085

408-720-8300

Dolly A Vance

Reg. 39054

Patent attorney

Rigel Pharmaceuticals, Inc.

South San Francsico, CA · 94080

650-624-1327

Thomas A Vandenberg

Reg. 45175

Patent attorney

Office of Chief Counsel

Sacramento, CA · 95812-0100

916-341-5195

Jacob A. Vander Griend

Reg. 84558

Patent agent

San Diego, CA · 92128

858-248-7199

Keith B Vanderveen

Reg. 38645

Patent agent

Tracy, CA · 95304

925-294-3207

Paul A VanderVelde

Reg. 74322

Patent attorney

Arrowhead Pharmaceuticals

San Diego, CA · 92131

608-405-73283244

Peter D. VandeVort

Reg. 82734

Patent attorney

DLA Piper

San Francisco, CA · 94105

415-615-6021

Paul W Vapnek

Reg. 24185

Patent attorney

KILPATRICK TOWNSEND & STOCKTON, LLP

San Francisco, CA · 94111

415-576-0200

David K Varn

Reg. 53718

Patent agent

San Jose, CA · 95128

408-243-9326

Rahul R. Vartak

Reg. 81617

Patent agent

Genentech Inc.

South San Francisco, CA · 94080

650-467-6826

Adeh Vartanian

Reg. 82171

Patent agent

Los Angeles, CA · 90071-3460

213-617-5495

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.