California

Patent attorneys in California

California hosts 9,567 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 Fox Factory, INC, Stanford University, and KILPATRICK TOWNSEND & STOCKTON, LLP.

Top cities in California

All practitioners in California

David M Haugen

Reg. 53000

Patent attorney

Fox Factory, INC

Watsonville, CA · 95076

831-274-8336

James Le Roy Haugen

Reg. 53001

Patent attorney

Livermore, CA · 94550

925-454-1318

John E Haugen

Reg. 60782

Patent attorney

Stanford University

Stanford, CA · 94305

650-725-7575

Paul C Haughey

Reg. 31836

Patent attorney

KILPATRICK TOWNSEND & STOCKTON, LLP

San Francisco, CA · 94111

415-273-4787

David L Hauser

Reg. 42643

Patent attorney

Edwards Lifesciences LLC

Irvine, CA · 92614

949-250-6878

Robert Scott Hauser

Reg. 37847

Patent attorney

Fitbit, Inc.

San Francisco, CA · 94105

415-377-6518

Matthieu V. Hausig

Reg. 83978

Patent attorney

Scale LLP

San Francisco, CA · 94104

415-735-5933

Eric R Havens

Reg. 70539

Patent attorney

Imperial County Counsel

El Centro, CA · 92243

442-265-1120

Sami I. S. Havens

Reg. 72572

Patent attorney

Taylor Made Golf Company, Inc.

Carlsbad, CA · 92008

661-900-3219

Thomas Bardwell Haverstock

Reg. 32571

Patent attorney

Haverstock and Owens LLP

Sunnyvale, CA · 94086

408-530-9700

Mikael Havluciyan

Reg. 47285

Patent attorney

Hybrid Law Group PC

San Diego, CA · 92101

619-990-5248

Kristin J. Havranek

Reg. 58789

Patent attorney

Antheros Legal Advisors LLP

San Diego, CA · 92212

858-275-8656

James E Hawes

Reg. 19680

Patent attorney

Norwalk, CA · 90650

760-220-2603

Brent A Hawkins

Reg. 44146

Patent attorney

Morgan, Lewis & Bockius LLP

San Francisco, CA · 94105-1596

415-442-1000

David C Hawkins

Reg. 76932

Patent agent

Kubota and Basol

Los Angeles, CA · 90071

213-280-4291

Philip E. Hawkyard

Reg. 81629

Patent agent

Concord, CA · 94521

925-787-2857

Emma L Hawley

Reg. 82298

Patent agent

San Diego, CA · 92122

920-366-4936

Joel J Hayashida

Reg. 30065

Patent attorney

San Francisco, CA · 94132

415-648-2880

Amy E. Hayden

Reg. 64817

Patent attorney

Russ, August & Kabat

Los Angeles, CA · 90025

310-826-7474

Robert D Hayden

Reg. 42645

Patent attorney

Rimon, PC

Menio Park, CA · 94025

650-461-4433

Nancy Haydt

Reg. 39217

Patent attorney

Law Office of Nancy Haydt

Ventura, CA · 93001

805-637-1061

Darlene Wendy Hayes

Reg. 33899

Patent attorney

Sebastopol, CA · 95444

707-474-7817

David Lloyd Hayes

Reg. 34838

Patent attorney

Fenwick and West LLP

Mountain View, CA · 94041

415-875-2411

Jeanine L Hayes

Reg. 44752

Patent attorney

Overture (Yahoo!)

Pasadena, CA · 91103

626-685-5600

Jennifer Hayes

Reg. 50845

Patent attorney

Nixon Peabody LLP

Palo Alto, CA · 94306

650-320-7725

Philip Hindley Haymond

Reg. 38177

Patent attorney

Law Offices Philip H. Haymond

Irvine, CA · 92618-2933

949-623-8765

Mark A Haynes

Reg. 30846

Patent attorney

Haynes Beffel & Wolfeld LLP

Half Moon Bay, CA · 94019

650-712-0340

William L Haynes

Reg. 48151

Patent attorney

Medtronic Vascular, Inc.

Santa Rosa, CA · 95403

707-543-5484

Andrew W. Hays

Reg. 75784

Patent agent

Harbor Freight Tools USA, Inc.

Calabasas, CA · 93004

818-850-9696

Roman S. Hays

Reg. 83373

Patent agent

Costa Mesa, CA · 92627

949-878-1429

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?

9,567 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.