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 Bozicevic, Field & Francis LLP, Smart Assets, Inc., and Veros Legal Solutions, LLP.

Top cities in California

All practitioners in California

David N. Armstrong

Reg. 83860

Patent attorney

Bozicevic, Field & Francis LLP

Redwood City, CA · 94065-1181

650-327-3400

Michelle R Arney

Reg. 54968

Patent agent

Smart Assets, Inc.

San Francisco, CA · 94109

415-991-1121

Thomas R Arno

Reg. 40490

Patent attorney

Veros Legal Solutions, LLP

San Diego, CA · 92106

858-987-4074

Deana A Arnold

Reg. 52567

Patent agent

Pacific Biosciences of California, Inc

Menlo Park, CA · 94025

650-521-8102

Monica M Arnold

Reg. 77262

Patent attorney

Armond Wilson LLP

Newport Beach, CA · 92660

949-386-7264

Elliot B Aronson

Reg. 29279

Patent attorney

Oakland, CA · 94618

510-658-9511

Anuj Arora

Reg. 78460

Patent agent

Aequitas Technologies LLC

Irvine, CA · 92614

949-274-0570

Aaron L. Arpi

Reg. 72598

Patent attorney

Kilpatrick Townsend & Stockton LLP

San Diego, CA · 92122

858-350-6108

Alfonso Arreguin Echeverria

Reg. 82312

Patent agent

Chula Vista, CA · 91910

619-678-8699

Peyman P. Aryanpur

Reg. 83861

Patent agent

Summit Patents

Healdsburg, CA · 95448

406-570-2730

Jason M. Arzhintar

Reg. 83767

Patent agent

Davis, CA · 95616

415-728-7121

David M Asarnow

Reg. 52569

Patent agent

Albany, CA · 94706

Marc R Ascolese

Reg. 42268

Patent attorney

Lab126

Cupertino, CA · 95041

408--79-2-9239

Steven L Ashburn

Reg. 56636

Patent attorney

Invoke IP P.C.

Danville, CA · 94526

703-340-6147

Gary W Ashley

Reg. 51418

Patent agent

Alameda, CA · 94502

510-521-7541

Nina M Ashton

Reg. 37273

Patent attorney

Cogent Law

Belmont, CA · 94002

650-207-6406

Dor Y. Ashur

Reg. 75115

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

619-553-1253

Keith G Askoff

Reg. 33828

Patent attorney

Mountain View, CA · 94041

650-862-7718

James T Aslanis· Jr

Reg. 65944

Patent agent

Dickinson Wright RLLP

Sunnyvale, CA · 94086

408-701-6134

Mehdi Asnaashari

Reg. 46524

Patent agent

Danville, CA · 94526

925-323-9921

Fareid A Asphahani

Reg. 72217

Patent agent

Ashurst Perkins Coie US LLP

San Diego, CA · 92130

858-720-5700

Dylan M. Aste

Reg. 67617

Patent attorney

Esconddido, CA · 92927

760-432-0584

Gaurav S Asthana

Reg. 68603

Patent attorney

Atlassian

San Francisco, CA · 94104

202-506-0012

David J Aston

Reg. 28051

Patent attorney

Fremont, CA · 94555

510-608-4924

Sanford Astor

Reg. 20748

Patent attorney

Brooks Kushman P.C. - Law Firm

Los Angeles, CA · 90017

213-622-3003

Kainoa B Asuega

Reg. 64271

Patent agent

Crowell & Moring

Irvine, CA · 92614

949-798-1371

Nicholas D Atchison

Reg. 63446

Patent attorney

Arista Networks, Inc.

Santa Clara, CA · 95054

408-547-8087

Ali Atefi

Reg. 63960

Patent attorney

Solana Beach, CA · 92075

310-435-2451

Pavinderjit S Athwal

Reg. 51029

Patent attorney

Applied Signal Technology, Inc.

Sunnyvale, CA · 94086

408-522-3537

Holly J Atkinson

Reg. 69934

Patent attorney

San Jose, CA · 95126

866-877-4883

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.