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 SAIC, Stetina Brunda Garred and Brucker, and Orrick Harrington & Sutcliffe LLP.

Top cities in California

All practitioners in California

Brian T Ster

Reg. 43933

Patent attorney

SAIC

San Diego, CA · 92121

858-826-9325

George M Steres

Reg. 36690

Patent agent

Saratoga, CA · 95070

408-741-1699

Michael D. Sterling

Reg. 79467

Patent agent

Pasadena, CA · 91101

218-830-8613

Kalyn M Stern

Reg. 68420

Patent agent

Rancho Palos Verdes, CA · 90275

310-999-9320

Robert J Stern

Reg. 29703

Patent attorney

Woodside, CA · 94062-2321

650-575-3011

Lewis Bernard Sternfels

Reg. 20761

Patent attorney

Los Angeles, CA · 90066

310-390-4022

Kit Michael Stetina

Reg. 29445

Patent attorney

Stetina Brunda Garred and Brucker

Aliso Viejo, CA · 92656

949-855-1246

Emmett W Stetz

Reg. 78222

Patent agent

Sunnyvale, CA · 94087

408-823-8412

Edwin Eugene Steussy

Reg. 68365

Patent agent

Orrick Harrington & Sutcliffe LLP

Los Angeles, CA · 90017-5855

213-612-2319

Andrew G Stevens

Reg. 62925

Patent agent

Q Bio, Inc.

Redwood City, CA · 94063

415-894-5723

Charles Donald Stevens

Reg. 53638

Patent attorney

Honda Patents & Technologies North America, LLC

Torrance, CA · 90501

310-781-4900

David R Stevens

Reg. 38626

Patent attorney

Stevens Law Group

San Jose, CA · 95110

408-288-7588

Joseph John Stevens

Reg. 58872

Patent attorney

Patterson & Sheridan, LLP

Palo Alto, CA · 94306-1556

650-330-2310

Sarah H. Stevens

Reg. 74818

Patent agent

Kubota & Basol LLP

Los Angeles, CA · 90017

213-408-0796

Walter Salathiel Eleazar Stevens

Reg. 33098

Patent attorney

Premier IP Protection LLC

Vista, CA · 92081

760-727-7987

Joseph L Stevenson

Reg. 43163

Patent attorney

San Diego, CA · 92130

858-350-8998

David S. Stewart

Reg. 81755

Patent agent

Escondido, CA · 92026

562-632-8049

Gordon McDairmid Stewart

Reg. 30528

Patent attorney

Pleasanton, CA · 94566

925-461-2369

Rory Connor Stewart

Reg. 56618

Patent attorney

Costa Mesa, CA · 92626

949-929-3033

Michael J Stift

Reg. 59155

Patent attorney

Santa Clarita, CA · 91350

661-296-6834

Mark A Stirrat

Reg. 50756

Patent agent

ONE LLP

Newport Beach, CA · 92660

949-502-2870

Matthew J Stockert

Reg. 69145

Patent attorney

Veros Legal Solutions LLP

San Diego, CA · 92106

858-987-4174

Davin M Stockwell

Reg. 41334

Patent attorney

Orrick, Herrington & Sutcliffe, LLP

Irvine, CA · 92614-8255

949-567-6700

Emma J Stockwell

Reg. 68676

Patent agent

Campbell, CA · 95008

408-616-9267

Daniel G Stoddard

Reg. 69146

Patent attorney

Fenwick & West, LLP

Mountain View, CA · 94041

650-335-7624

Jeremiah Stoddard

Reg. 78274

Patent attorney

Eastman IP

San Diego, CA · 92108

619-230-1144

Kevin D Stoddart

Reg. 53643

Patent agent

San Jose, CA · 95127

408-272-3456

Joel T Stoffregen

Reg. 65826

Patent agent

YHE Law LLP

Lafayette, CA · 94549

415-634-7095

Sara Adina Stohl

Reg. 78293

Patent attorney

Los Angeles, CA · 90064

323-979-7213

Damien P. Stolarz

Reg. 67646

Patent agent

Los Angeles, CA · 91303

310-598-1267

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.