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 W Cubed Patent Svcs, Alphatec Spine, Inc., and Belasco Jacobs & Townsley, LLP.

Top cities in California

All practitioners in California

Robert W. Winn

Reg. 61304

Patent attorney

Alphatec Spine, Inc.

Carlsbad, CA · 92008

760-494-6727

Courage C Winter

Reg. 47181

Patent agent

W Cubed Patent Svcs

Malibu, CA · 90265

310-589-9544

Gentle E Winter

Reg. 48598

Patent attorney

Belasco Jacobs & Townsley, LLP

Los Angeles, CA · 90045

310-743-1188

Gregory J Winter

Reg. 77931

Patent attorney

Vanta Inc.

San Francisco, CA · 94111

415-237-3244

Megan C. Winter

Reg. 54411

Patent attorney

Slaughter, Reagan & Cole LLP

Ventura, CA · 93001

805-658-7800

Robert B Winter

Reg. 34458

Patent agent

Amgen Inc.

Thousand Oaks, CA · 91320

805-447-2425

Vision L Winter

Reg. 47182

Patent agent

W Cubed Patent Svcs

Malibu, CA · 90265

310-589-9544

Dana F Winterrowd

Reg. 37553

Patent attorney

Carmichael, CA · 95608

916-768-4773

William E Winters

Reg. 42232

Patent attorney

Patent Law Professionals

San Jose, CA · 95110

David M. Wirth

Reg. 82411

Patent agent

San Diego, CA · 92128

424-256-5087

Gregory F Wirzbicki

Reg. 27606

Patent attorney

Yorba Linda, CA · 92886-2121

714-993-0381

Anthony M Wise

Reg. 61870

Patent attorney

Cole-Frieman & Mallon LLP

San Francisco, CA · 94111

415-762-2863

Michael J Wise

Reg. 34047

Patent attorney

Perkins Coie LLP

Los Angeles, CA · 90067-1721

310-788-3210

Theodore Spencer Wise

Reg. 79789

Patent attorney

Senax, Inc.

San Francisco, CA · 94121

415-890-6344

Howard N Wisnia

Reg. 37502

Patent attorney

Wisnia PC

San Diego, CA · 92130

858-461-0989

Mark G Wisnosky

Reg. 57201

Patent attorney

Law Office of Mark Wisnosky

San Diego, CA · 92103

858-663-7794

Richard M. Witas

Reg. 81919

Patent agent

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

120-264-06415

Nicholas J Witchey

Reg. 63481

Patent agent

Nantworks LLC

Culver City, CA · 90232

310-853-7468

Alexander U Witkowski

Reg. 43280

Patent attorney

Witkowski Law

Oakland, CA · 94612-4700

650-488-4500

Eric H Witt

Reg. 44408

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-493-9300

Chelsea E. Witte-Garcia

Reg. 75713

Patent attorney

Amgen Inc

Thousand Oaks, CA · 91320

858-914-7304

Clarke A Wixon

Reg. 39878

Patent attorney

Rainin Instrument, LLC

Oakland, CA · 94621

510-564-1600

Jacek M. Wnuk

Reg. 73210

Patent attorney

Polsinelli

San Francisco, CA · 94111

415-248-2122

Briana R. Wobbe

Reg. 77542

Patent agent

Fenwick & West LLP

Mountain View, CA · 94041

650-335-7766

Richard Von Wohld

Reg. 48018

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-974-8738

Kathy A. Wojtalewicz

Reg. 64266

Patent agent

The Mueller Law Office

San Diego, CA · 92130

248-417-1007

Ian D. Wolcott

Reg. 83279

Patent agent

Laguna Beach, CA · 92651

949-315-0660

Claire R Wolf

Reg. 73481

Patent attorney

Marvell Semiconductor

Irvine, CA · 92618

301-873-6641

Erick P Wolf

Reg. 53787

Patent attorney

Fountain Valley, CA · 92708

949-478-2933

Richmond A Wolf

Reg. 47319

Patent agent

Pasadena, CA · 91106

213-479-7728

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.