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 YHE Law, Hitachi Global Storage Technologies, Inc., and Veracyte, Inc..

Top cities in California

All practitioners in California

Rachel L. Schwein

Reg. 81135

Patent attorney

YHE Law

Lafayette, CA · 94549

415-662-0131

Robert Otto Schwenker

Reg. 46497

Patent agent

Hitachi Global Storage Technologies, Inc.

San Jose, CA · 95193

408-717-6596

Olga S V Schwier

Reg. 70377

Patent attorney

Veracyte, Inc.

South San Francisco, CA · 94080

650-243-6300

Roland H Schwillinski

Reg. 48585

Patent attorney

Illumina, Inc.

San Diego, CA · 92122

858-202-4500

Derek B Scott

Reg. 59456

Patent attorney

Genentech

South San Francisco, CA · 94080

650-866-7549

Eddie Elmer Scott

Reg. 25220

Patent attorney

Lawrence Livermore National Security LLC

Livermore, CA · 94551

925-424-6897

Edward W Scott· IV

Reg. 36000

Patent attorney

Scott IP

Monte Sereno, CA · 95030

650-209-7969

Melanie A Seader

Reg. 61110

Patent attorney

Southern California Edison

Rosemead, CA · 91770

626-302-1216

Charles Bret Seaton

Reg. 46171

Patent agent

Seaton & Associates

San Diego, CA · 92130

858-259-2873

Jesus J Sedano

Reg. 68622

Patent attorney

Concentric Power Inc.

Salinas, CA · 93901

713-702-4455

Sami Sedghani

Reg. 76960

Patent attorney

McDermott Will and Emery

Menlo Park, CA · 94025

650-815-7400

Matthew S. See

Reg. 84074

Patent agent

Oakland, CA · 94609

734-864-2125

Bartholomew A. Seeley

Reg. 63918

Patent attorney

Canon U.S.A., Inc.

Irvine, CA · 92612

949-932-3162

Lisa J. Seeley

Reg. 59354

Patent attorney

YHE Law LLP

Lafayette, CA · 94549

415-599-0661

Melanie J Seelig

Reg. 44328

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

206-405-2000

Alik Segal

Reg. 50778

Patent attorney

Los Angeles, CA · 90048

310-367-3626

Allan L. Segal

Reg. 76439

Patent attorney

Law Office of Allan L. Segal

Costa Mesa, CA · 92628

949-209-9120

Richard P Sehr

Reg. 52504

Patent agent

Santa Clara, CA · 95054

408-496-0419

Richard Dorland Seibel

Reg. 22134

Patent attorney

Glendale, CA · 91109

818-545-9473

Frederick J Seidl

Reg. 83630

Patent agent

San Mateo, CA · 94402

408-387-4707

Abraham N Seidman

Reg. 41300

Patent attorney

Indio, CA · 92202

310-766-6348

Stephanie Lenore Seidman

Reg. 33779

Patent attorney

Womble Bond Dickinson LLP

San Diego, CA · 92121

858-313-1405

Joshua D. Seitz

Reg. 80191

Patent agent

Gilead Sciences

Foster City, CA · 94404

650-522-2437

Mark A Seka

Reg. 44330

Patent attorney

Novartis Vaccines & Diagnostics, Inc.

Emeryville, CA · 94608-2916

510-923-2706

Simran S Sekhon

Reg. 74020

Patent agent

Sekhon & O'Bryant, A Professional Law Corporation

Woodbridge, CA · 95258

209-924-4990

Mizuna Sekine

Reg. 81159

Patent attorney

Wilmer Cutler Pickering Hale and Dorr LLP

Palo Alto, CA · 94306

650-858-6000

Jan Katherine Andrews Selberg

Reg. 47931

Patent agent

San Diego, CA · 92131

619-310-0661

Todd W Selbo

Reg. 40164

Patent agent

Irvine, CA · 92603

949-387-9864

Joel C Selcher

Reg. 59783

Patent agent

Saegis Pharmaceuticals, Inc.

Half Moon Bay, CA · 94019

650-560-0210 X257

Robert Alan Seldon

Reg. 27156

Patent attorney

Ignite Business Law

Los Angeles, CA · 90064

310-443-9100

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.