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 Knobbe, Martens, Olson & Bear, LLP, Alston & Bird LLP, and Qualcomm Inc..

Top cities in California

All practitioners in California

Christopher S.M. Zoog

Reg. 79188

Patent attorney

Van Nuys, CA · 91401

818-530-8851

Marko R Zoretic

Reg. 65994

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Dana M. Zottola

Reg. 65942

Patent attorney

Alston & Bird LLP

San Francisco, CA · 94105

650-838-2044

Yixiong Zou

Reg. 59551

Patent agent

Qualcomm Inc.

San Diego, CA · 92121-1714

858-845-8723

Amin Zoufonoun

Reg. 48065

Patent attorney

FACEBOOK, Inc.

Menlo Park, CA · 94025

650-543-4800

Nicholas M Zovko

Reg. 61557

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Chloe Zubieta

Reg. 64104

Patent agent

Chevron Corporation

Richmond, CA · 94802

510-242-3886

Austin L. Zuck

Reg. 81341

Patent attorney

Morgan Lewis & Bockius

Palo Alto, CA · 94304

650-843-726

Valentin B Zunic

Reg. 74394

Patent attorney

Wilson Sonsini Goodrich & Rosati PC

San Diego, CA · 92130

858-350-2211

Anthony C Zuppero

Reg. 62988

Patent agent

Coben and Associates

Sacramento, CA · 95814

530-647-1975

Anthony P Zuttarelli

Reg. 41485

Patent agent

US Air Force

Edwards Air Force Base, CA · 93524

661-275-5698

Stephen E. Zweig

Reg. 60144

Patent attorney

Stephen E. Zweig, Patent Attorney

Los Gatos, CA · 95032

408-348-1495

Eric J Zylstra

Reg. 61330

Patent agent

Townsend and Townsend and Crew LLP

Walnut Creek, CA · 94596

925-472-5000

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.