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 Wilson Sonsini Goodrich & Rosati, Law Offices of Raymond Sun, and Morgan, Lewis & Bockius LLP.

Top cities in California

All practitioners in California

Raymond C Sun

Reg. 35699

Patent attorney

Law Offices of Raymond Sun

Irvine, CA · 92606

949-252-9180

Tingting Sun

Reg. 800149

Limited recognition

Irvine, CA · 92614

805-806-8959

Ya-Lin Sun

Reg. 57378

Patent agent

Temple City, CA · 91780

626-448-9448

Yalei Sun

Reg. 57765

Patent attorney

Morgan, Lewis & Bockius LLP

Palo Alto, CA · 94306

650-843-7558

Yang Sun

Reg. 82525

Patent agent

Fremont, CA · 94539

650-613-8164

Yi Sun

Reg. 76752

Patent attorney

Latham & Watkins LLP

San Diego, CA · 92130

858-523-5415

Yinhang Sun

Reg. 81656

Patent agent

Hacienda Heights, CA · 91745

909-588-7765

Yujia Sun

Reg. 84636

Patent agent

Morrison & Foerster LLP

Palo Alto, CA · 94304-1018

212-336-4263

Yuting Sun

Reg. 84421

Patent agent

San Diego, CA · 92127

612-232-1759

Lin Sun-Hoffman

Reg. 47983

Patent attorney

Sun - Hoffman Consulting

Palo Alto, CA · 94303

650-773-3538

Steven A. Sundberg

Reg. 74291

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3147

Stacie J Sundquist

Reg. 53654

Patent attorney

Womble Bond Dickinson LLP

Los Angeles, CA · 90025-1030

310-207-3800

John S Sundsmo

Reg. 34446

Patent agent

BioMEDPATENT

Sausalito, CA · 94965

760-994-7028

Brian K. Sung

Reg. 72057

Patent attorney

KPPB LLP

Anaheim, CA · 92806

949-852-0000

Kieun Jenny Sung

Reg. 48639

Patent attorney

Innovation Counsel LLP

San Jose, CA · 95134

408-331-1672

Tiffany K Sung

Reg. 78223

Patent attorney

Foley & Lardner LLP

Los Angeles, CA · 90071

213-814-8356

Paul D Supnik

Reg. 26511

Patent attorney

Law Office of Paul D. Supnik

Beverly Hills, CA · 90212

310-859-0100

Anup A. Suresh

Reg. 65338

Patent attorney

Schwegman Lundberg & Woessner, P.A.

San Jose, CA · 95113

408-660-2977

Christina Susanto

Reg. 73677

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 95053

650-493-9300

Kiran M Sutaria

Reg. 82629

Patent attorney

Palo Alto, CA · 94304

650-750-6559

Andrew J Sutton

Reg. 73855

Patent attorney

Salesforce Inc.

Washington, CA · 94105

415-517-4048

Charles Robert Sutton

Reg. 42176

Patent attorney

Charles R. Sutton

Pasadena, CA · 91101

626-510-4286

Eric L. Sutton

Reg. 61173

Patent attorney

Invoke IP

Danville, CA · 94526

630-219-0939

Reginald J Suyat

Reg. 28172

Patent attorney

Oakland, CA · 94605

510-632-7732

Kenta Suzue

Reg. 45145

Patent attorney

Sunnyvale, CA · 94087

408-716-8539

Yuki Suzuki

Reg. 800096

Limited recognition

KENJA IP LAW PC

San Jose, CA · 95113

650-561-4758

Leonard R Svensson

Reg. 30330

Patent attorney

Birch, Stewart, Kolasch & Birch, LLP

San Diego, CA · 92130

858-792-8855

J. Steven Svoboda

Reg. 44366

Patent attorney

Berkeley, CA · 94705

510-827-5771

Joseph K. Swabeck

Reg. 78778

Patent agent

Wilson Sonsini Goodrich and Rosati

San Francisco, CA · 94107-1946

415-471-3942

Brennan C Swain

Reg. 43175

Patent attorney

Santa Monica, CA · 90404

310-785-5308

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.