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 Kilpatrick Townsend & Stockton LLP, Siemens Corp., and Morrison Foerster LLP.

Top cities in California

All practitioners in California

Anand Sethuraman

Reg. 43351

Patent attorney

Siemens Corp.

Mountain View, CA · 94039

650-943-7554

David T Seto

Reg. 67679

Patent agent

San Diego, CA · 92121

619-940-5439

Rebecca W Setrakian

Reg. 77895

Patent attorney

Morrison Foerster LLP

Los Angeles, CA · 90017-3543

213-892-5200

Calvin Settachatgul

Reg. 69143

Patent agent

San Mateo, CA · 94401

510-220-8405

Candace S Seu

Reg. 78406

Patent agent

Lewis Roca Rothgerber Christie, LLP

Glendale, CA · 91203

626-683-4556

Larry E Severin

Reg. 54606

Patent attorney

Los Alamitos, CA · 90720

562-706-4328

Eric W Severini

Reg. 77183

Patent agent

LeClairRyan, LLP

Sacramento, CA · 95814

916-246-8002

Bonita L Severy

Reg. 43913

Patent attorney

Los Angeles, CA · 90046

323-954-8675

John B Sganga· Jr

Reg. 31302

Patent attorney

Knobbe Martens Olson and Bear

Irvine, CA · 92614

949-760-0404

Steven M. Sha

Reg. 60681

Patent agent

San Francisco, CA · 94132

415-235-5178

William L Shaffer

Reg. 37234

Patent attorney

Kilpatrick Townsend & Stockton LLP

San Francisco, CA · 94111

650-326-2400

Ali Hassan Shah

Reg. 58803

Patent attorney

Apple, Inc.

Cupertino, CA · 95014

408-862-4362

Alicia L. Shah

Reg. 68080

Patent attorney

San Jose, CA · 95134

408-544-6967

Archit P. Shah

Reg. 65873

Patent attorney

Robinhood Markets Inc.

Palo Alto, CA · 94306

617-290-2611

Keyur C Shah

Reg. 75904

Patent agent

San Ramon, CA · 94582

408-582-3398

Khushboo U. Shah

Reg. 81547

Patent attorney

Berkeley, CA · 94720

510-229-8738

Kunjal J Shah

Reg. L1183

Limited recognition

Palo Alto, CA · 94304

650-843-4000

Mansi H Shah

Reg. 59904

Patent attorney

Kilpatrick Townsend & Stockton LLP

Menlo Park, CA · 94025

650-326-2400

Maulik G Shah

Reg. 75027

Patent attorney

Free Stream Media Corp.

San Francisco, CA · 94107

650-353-0109

Neel B Shah

Reg. 54838

Patent agent

Sunnyvale, CA · 94086

650-988-7177

Nirja R Shah

Reg. 69309

Patent agent

Milpitas, CA · 95035

818-983-4010

Siddhi S Shah

Reg. 76737

Patent agent

El Dorado Hills, CA · 95762

480-703-8953

Sonali K Shah

Reg. 77184

Patent attorney

Hogan Lovells US LLP

San Francisco, CA · 94111

415-374-2476

Varun A Shah

Reg. 62196

Patent attorney

Invoke IP, P.C.

Danville, CA · 94526

408-657-8483

Ray K Shahani

Reg. 37554

Patent attorney

Shahani Intellectual Property Law

South San Francisco, CA · 94080

650-348-1444

Lara B. H. Shahin

Reg. 82669

Patent agent

San Diego, CA · 92129

+16-199-942603

Elnaz Shahla

Reg. 81838

Patent attorney

Shahla Legal APC

Costa Mesa, CA · 92626

949-241-0866

Allen C. Shahshahani

Reg. 84681

Patent agent

Menlo Park, CA · 94025

650-391-8004

Hasan B. Shaik

Reg. 79315

Patent attorney

Davis, CA · 95618

530-304-1276

Ahsan A Shaikh

Reg. 61861

Patent attorney

McDermott Will & Emery

Irvine, CA · 92614-2559

949-757-6304

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.