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 The Clorox Company, Vista IP Law Group LLP, and Haynes and Boone, LLP.

Top cities in California

All practitioners in California

Neal M Cohen

Reg. 41683

Patent attorney

Vista IP Law Group LLP

Irvine, CA · 92618

949-724-1849

Andrew B Cohn

Reg. 69739

Patent attorney

Haynes and Boone, LLP

Costa Mesa, CA · 92626

949-202-3000

Steven M Colby

Reg. 50250

Patent attorney

Peters Verny, LLP

Palo Alto, CA · 94306

650-324-1677

Adam J. Cole

Reg. 71901

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Francisco, CA · 94107-1946

650-849-3298

Cameron C Cole

Reg. 68480

Patent attorney

Venable LLP

San Francisco, CA · 94111

415-653-3750

Eric C Cole

Reg. 52760

Patent attorney

Baker Manock and Jensen

Fresno, CA · 93704

559-432-5400

Graham B. Cole

Reg. 72626

Patent attorney

Proskauer Rose LLP

Los Angeles, CA, CA · 90067

310-284-5627

Joseph Cole

Reg. 59293

Patent agent

San Diego, CA · 92131

619-820-9845

Louis E. Cole

Reg. 81147

Patent agent

Kubota & Basol LLP

Los Angeles, CA · 90071

213-462-2620

Nicholas A. Cole

Reg. 60957

Patent attorney

Tasty IP, Limited

San Diego, CA · 92107

858-245-2984

Azariah D Cole-Shephard

Reg. 83238

Patent agent

Castro Valley, CA · 94552

510-552-2326

Brian R Coleman

Reg. 39145

Patent attorney

Perkins Coie LLP

Palo Alto, CA · 94304

650-838-4441

James W Collett

Reg. 46636

Patent attorney

Paramount BioSciences LLC

San Diego, CA · 92121

858-731-8521

Steven W Collier

Reg. 42429

Patent attorney

Dermira, Inc.

Menlo Park, CA · 94025

650-422-7708

David P. Collins

Reg. 81148

Patent agent

San Diego, CA · 92111

949-533-4174

Erin L Collins

Reg. 52889

Patent agent

The Clorox Company

Oakland, CA · 94612

510-271-3219

Jonathan I. Collins

Reg. 82331

Patent agent

Mahamedi IP Law

Victorville, CA · 92394

140-889-16316

Mark L. Collins

Reg. 71031

Patent agent

San Diego, CA · 92122

858-952-8827

Veronica M Collins

Reg. 82991

Patent agent

San Clemente, CA · 92673

949-426-8054

Robert Combs Colwell

Reg. 27431

Patent attorney

Kipatrick Townsend, LLP

Menlo Park, CA · 94025

650-324-6303

David W Combiths

Reg. 72714

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-651-7685

Dominique E. Combs

Reg. 71561

Patent attorney

Sheppard Mullin Richter & Hampton LLP

San Diego, CA · 92130-4088

858-720-8900

Stacy Hegle Combs

Reg. 50687

Patent agent

The Clorox Company

Oakland, CA · 94612

925-425-6905

Joseph A Compton

Reg. 34308

Patent agent

Encino, CA · 91436

818-388-1201

Leonard D. Conapinski

Reg. 66048

Patent attorney

Yingli Green Energy Americans, Inc.

San Francisco, CA · 94108

415-728-0468

Michael P Condakes

Reg. 80961

Patent attorney

Palo Alto, CA · 94302

408-499-0509

Celine I Conde

Reg. 79388

Patent agent

DLA Piper, LLP(US)

San Diego, CA · 92121

858-677-1422

Debra Dahl Condino

Reg. 31007

Patent attorney

Allergan, Inc.

Irvine, CA · 92612

714-246-2388

Deirdre L Conley

Reg. 36487

Patent attorney

South San Francisco, CA · 94080

650-588-7576

James P Conley

Reg. 52459

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

San Diego, CA · 92130-4088

858-509-4050

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.