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, Troutman Sanders LLP, and Zuora, Inc..

Top cities in California

All practitioners in California

Kyle M. Headrick

Reg. 78425

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2311

Michael Francis Heafey

Reg. 38178

Patent attorney

Troutman Sanders LLP

San Francisco, CA · 94104

415-477-5710

Elaine Marie Heal

Reg. 44149

Patent attorney

Zuora, Inc.

Palo Alto, CA · 94404

408-373-9166

John F Heal

Reg. 53008

Patent attorney

Applied Medical Resources Corporation

Rancho Santa Margarita, CA · 92688

949-713-8283

Noel F Heal

Reg. 26074

Patent attorney

Noel F Heal Law Office

Palo Alto, CA · 94306

408-373-9166

Vicki Lynn Healy

Reg. 48343

Patent attorney

Amgen

Thousand Oaks, CA · 91320

805-447-3630

Micheal L Hebert

Reg. 63329

Patent attorney

Greenberg Traurig, LLP

San Diego, CA · 92130

619-848-2513

David R Heckadon

Reg. 50184

Patent attorney

Gordon & Rees, LLP

San Francisco, CA · 94111

415-875-3266

Gary A Hecker

Reg. 31023

Patent attorney

Munck Wilson Mandala, LLP

Los Angeles, CA · 90067

310-855-3311

Peter A Hecker

Reg. 74236

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130-3002

858-350-2321

Richard F Hector

Reg. 51796

Patent attorney

Amunix, Inc.

Mountain View, CA · 94043

650-428-1800

William A. Hector

Reg. 66823

Patent attorney

Venable, LLP

San Francisco, CA · 94111

415-653-3738

Suzanne Jones Heeg

Reg. 35911

Patent attorney

Northrop Grumman Corporation

El Segundo, CA · 90245

310-331-6833

Nima Hefazi

Reg. 63658

Patent attorney

Newport Coast, CA · 92657

949-760-5204

Siamak S Hefazi

Reg. 75174

Patent attorney

Buchalter, APC

San Diego, CA · 92130

619-679-1579

Brenda J. Hefti

Reg. 69267

Patent attorney

Exelixis, Inc.

Alameda, CA · 95602

650-837-7000

Kendra S Heger

Reg. 55436

Patent attorney

FMA LLP S4S LLC and Strong Force Intellectual Capital, LLC

Alta Loma, CA · 91701

248-318-7780

David William Heid

Reg. 25875

Patent attorney

Rio Vista, CA · 94571

707-374-4892

Andrew E Heidari

Reg. 79232

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2367

Colin B Heideman

Reg. 61513

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Seattle, CA · 98104

206-405-2000

Julie A Heider

Reg. 54161

Patent attorney

Genentech, Inc.

South San Francisco, CA · 94080

1-6-50--467-7743

Elise R Heilbrunn

Reg. 42649

Patent attorney

Weaver Austin Villeneuve & Sampson LLP

Oakland, CA · 94607

510-663-1100

Jeffery Scott Heileson

Reg. 46765

Patent attorney

Sony Interactive Entertainment LLC

San Mateo, CA · 94404

650-655-8000

Alan E Heimlich

Reg. 48808

Patent attorney

Heimlich Law

San Jose, CA · 95129

408-646-1921

M Henry Heines

Reg. 28219

Patent attorney

Kilpatrick, Townsend & Stockton, LLP

San Francisco, CA · 94111

415-576-0200

Anna Lynne Heinkel

Reg. 44755

Patent attorney

Law Office of Anna Lynne Heinkel

Campbell, CA · 95008

408-442-6514

David E Heisey

Reg. 42651

Patent attorney

Sheppard, Mullin, Richter & Hampton LLP

San Diego, CA · 92130-3051

858-720-8900

Bradley Paul Heisler

Reg. 35892

Patent attorney

Heisler & Associates

Roseville, CA · 95661

916-781-6634

Warren Stuart Heit

Reg. 36828

Patent attorney

White and Case, LLP

Palo Alto, CA · 94306

650-213-0321

Erica J. Helgerson

Reg. 74255

Patent agent

San Diego, CA · 92121

619-227-0637

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.