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 Fish & Richardson P.C., ASK IP LAW, and Patterson & Sheridan, LLP.

Top cities in California

All practitioners in California

Michael P Shepherd

Reg. 64231

Patent attorney

Fish & Richardson P.C.

Redwood City, CA · 94063

650--83-9-5165

Aileen Carey Shepherd Kell

Reg. 77327

Patent attorney

ASK IP LAW

San Juan Capistrano, CA · 92675

619-564-1516

James Anton Sheridan

Reg. 25435

Patent attorney

Patterson & Sheridan, LLP

Palo Alto, CA · 94306-1556

650-330-2310

Rachel A. Sheridan

Reg. 73032

Patent attorney

Patterson & Sheridan LLP

Palo Alto, CA · 94306

650-384-4400

Richard John Sheridan

Reg. 28265

Patent attorney

El Granada, CA · 94018-2091

650-726-3595

Jeffrey T. Sheriff

Reg. 68131

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

San Diego, CA · 92130-4088

858-509-4081

Louise Sherikar

Reg. 32337

Patent agent

Mission Viejo, CA · 92691

949-859-4567

Mridula P Sherin

Reg. 54652

Patent agent

Cooley LLP

San Diego, CA · 92121

858-550-6000

Daniel E Sherman

Reg. 53586

Patent agent

Genetech INC

South San Francisco, CA · 94080

650-225-1000

Edward S Sherman

Reg. 43115

Patent attorney

Meyer Corp., US

Vallejo, CA · 94590

707-551-2733

Kathleen F Sherman

Reg. 69451

Patent attorney

Berliner Cohen

San Jose, CA · 95113

408-286-5800

Kenneth Lee Sherman

Reg. 33783

Patent attorney

Sherman IP LLP

Los Angeles, CA · 91436

424-229-6800

Penelope L Sherman

Reg. 55613

Patent attorney

Scotts Valley, CA · 95066

Michael Leslie Sherrard

Reg. 28041

Patent attorney

Los Altos, CA · 94022

650-804-5371

Pamela J Sherwood

Reg. 36677

Patent agent

Bozicevic, Field & Francis LLP

Redwood City, CA · 94065

650-327-3400

Michael R Shevlin

Reg. 38724

Patent attorney

Law Office of Michael R. Shevlin

La Mesa, CA · 91941

619-578-9876

Jennifer Y Shi

Reg. 65099

Patent attorney

Sunnyvale, CA · 94087

650-867-4532

Justin S. Shi

Reg. 68521

Patent agent

Sunnyvale, CA · 94086

415-527-9242

Qin Shi

Reg. 52220

Patent attorney

San Francico, CA · 94105-6164

650-320-1626

Yi Shi

Reg. 80227

Patent agent

Menlo Park, CA · 94025

650-352-1954

Emi Shibata

Reg. 80706

Patent attorney

Asahi Intecc USA, Inc.

Irvine, CA · 92614

855-286-9473

Samuel Shiber

Reg. 26335

Patent agent

Santa Barbara, CA · 93109

805-275-4113

Judy Liao Shie

Reg. 50305

Patent attorney

Pure Storage, Inc.

Santa Clara, CA · 94054

800-379-7873

Andrew I Shieh

Reg. 68117

Patent agent

Artilux Inc.

San Francisco, CA · 94115

917-519-9814

Wei-Jun Shieh

Reg. 72092

Patent attorney

Sunnyvale, CA · 94088

408-981-5412

Terri M Shieh-Newton

Reg. 47081

Patent attorney

Mintz, Levin, Cohn, Ferris, Glovsky & Popeo,P.C.

San Francisco, CA · 94104

415-432-6084

Albert Shih

Reg. 59588

Patent attorney

Irvine, CA · 92620

949-370-9234

Barbara W Shih

Reg. 46048

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304-1050

650-565-3927

Jennifer J Shih

Reg. 68675

Patent attorney

Fish IP Law

Redwood City, CA · 94065

949-843-8300

John Karl Shimmick

Reg. 44335

Patent attorney

FisherBroyles LLP

Palo Alto, CA · 94301

650-703-0397

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.