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 Greenberg Traurig LLP, Morrison and Foerster LLP, and Greenberg Traurig, LLP.

Top cities in California

All practitioners in California

John P Ward

Reg. 40216

Patent attorney

Greenberg Traurig LLP

East Palo Alto, CA · 94303

650-328-8500

Megan B Ward

Reg. 48297

Patent attorney

Menlo Park, CA · 94025

650-888-0471

Michael R Ward

Reg. 38651

Patent attorney

Morrison and Foerster LLP

San Francisco, CA · 94105

415-268-6237

Monica Lee Ward

Reg. 40696

Patent attorney

Los Gatos, CA · 95032

408-656-6714

Robert D. Ward

Reg. 71572

Patent attorney

Greenberg Traurig, LLP

San Diego, CA · 92130

619-848-2500

Simone V Ward

Reg. 72531

Patent attorney

Arcturus Therapeutics, Inc.

San Diego, CA · 92121

858-900-2660

Thomas A Ward

Reg. 35732

Patent attorney

Palo Alto, CA · 94303

925-323-8959

William F. Ward· III

Reg. 51059

Patent attorney

3DT Holdings, LLC

San Diego, CA · 92121

858-249-7400

Greg T Warder

Reg. 50208

Patent attorney

Maxim Integrated

San Jose, CA · 95134

408-601-1000

Stephen Warhola

Reg. 43237

Patent attorney

Skyworks Solutions, Inc.

Irvine, CA · 92617

949-231-3000

Allen W Wark

Reg. 30503

Patent attorney

Abbott Diabetes Care Inc.

Alameda, CA · 94502

510-749-5479

James Michael Warner

Reg. 45199

Patent attorney

South San Francisco, CA · 94080

650-615-7440

Peter C Warner

Reg. 36994

Patent attorney

Law Offices of Peter C Warner

Marina Del Rey, CA · 90292

480-894-6500

James G Warren

Reg. 63747

Patent attorney

P.K. Schrieffer LLP

West Covina, CA · 91791

626-373-2444

Joseph M Warren

Reg. 48273

Patent attorney

Coronado, CA · 92118

858-414-5833

Matthew S. Warren

Reg. 83708

Patent attorney

U.S. Department of Homeland Security

San Diego, CA · 92154

617-997-6381

Lynn M Warren Stewart

Reg. 61869

Patent agent

Ionis Pharmaceuticals, Inc.

Carlsbad, CA · 92010

760-268-4941

Kenneth L Warsh

Reg. 30898

Patent attorney

Escondido, CA · 92025

750-480-8593

Mark L Warzel

Reg. 47264

Patent agent

Chevron Corporation

San Ramon, CA · 94583-0806

714-454-3649

Wendy L Washtien

Reg. 36301

Patent agent

San Francisco, CA · 94118

415-636-2227

Robin A Wasserman

Reg. 43240

Patent agent

Westlake Village, CA · 91361

818-851-9235

George W Wasson

Reg. 17685

Patent attorney

Lafayette, CA · 94549

925-283-4420

Joshua A Watanabe

Reg. 53748

Patent attorney

Los Altos, CA · 94024-7115

650-961-8548

Ryota Watanabe

Reg. 75942

Patent attorney

Kim & Stewart LLP

San Jose, CA · 95113

408-620-4145

Rex W Watkins

Reg. 68924

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3144

Brent T. Watson· Jr.

Reg. 70212

Patent attorney

Latham & Watkins, LLP.

San Diego, CA · 92130

858-523-3944

Karen J Watson

Reg. 57823

Patent agent

Endeavor Biomedicines

San Diego, CA · 92130

310-922-1165

Mark P Watson

Reg. 31448

Patent attorney

Monterey, CA · 93940

831-747-2063

Mark A Watson

Reg. 41370

Patent attorney

Naval Surface Warfare Center, Port Hueneme Division

Port Hueneme, CA · 93043

805-535-5887

Timothy R. Watson

Reg. 76328

Patent attorney

Alston & Bird LLP

East Palo Alto, CA · 94303

650-838-2031

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.