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 Knobbe Martens, Schwegman, Lundberg & Woessner, and Beckman Coulter, Inc..

Top cities in California

All practitioners in California

Stacy Rush

Reg. L1081

Limited recognition

Knobbe Martens

Irvine, CA · 92614

646-575-6066

Silvia Rusnac

Reg. 69601

Patent attorney

Schwegman, Lundberg & Woessner

San Jose, CA · 95113

408-660-2989

Alexander J. Russell

Reg. 82091

Patent agent

San Francisco, CA · 94121

847-708-9900

Jeffry Karl Russell

Reg. 60935

Patent agent

Beckman Coulter, Inc.

Brea, CA · 92822

714-961-6328

Jennifer Lynn Russell

Reg. 60059

Patent attorney

NuVasive, Inc.

San Diego, CA · 92121

858-320-4537

Jessica N. Russell

Reg. 66132

Patent attorney

Genentech, Inc.

South San Francisco, CA · 94080

650-296-3830

Valerie L.ynn Russell

Reg. 40406

Patent attorney

Portola Valley, CA · 94028

650-851-5412

Matthew Joseph Russo

Reg. 41282

Patent attorney

Takeda Pharmaceuticals U.S.A., Inc.

San Diego, CA · 92121

619-930-8323

David B Rutan

Reg. 55791

Patent attorney

MTI Laboratory

El Segundo, CA · 90245

310-955-3761

Isaac M Rutenberg

Reg. 57419

Patent agent

Bozicevic, Field & Francis LLP

East Palo Alto, CA · 94303

650-327-3400

Matthew C. Ruth

Reg. 83453

Patent attorney

San Diego, CA · 92121

858-707-4000

Stephen A Rutkowski· III

Reg. 78454

Patent attorney

Aikin & Gallant, LLP

Los Altos, CA · 94022

732-331-9220

John F Ryan

Reg. 47050

Patent attorney

Ventura, CA · 93003

669-242-0633

Richard A Ryan

Reg. 39014

Patent attorney

Richard A. Ryan

Fresno, CA · 93711

559-447-1837

James F Ryley

Reg. 68868

Patent agent

Downey, CA · 90241

410-931-3333

Albert B Ryu

Reg. 70574

Patent attorney

KIOXIA America, Inc.

Irvine, CA · 92617

949-308-5655

Jaewook Ryu

Reg. 74019

Patent attorney

IRVINE, CA · 92602

714-222-9856

Kyu Wan Ryu

Reg. 74525

Patent agent

Innovation Counsel LLP

San Jose, CA · 95134

408-331-1682

Walid K Sabbagh· Jr.

Reg. 62541

Patent agent

Irvine, CA · 92620

949-551-3415

Yaasha Sabbaghian

Reg. 70149

Patent agent

San Jose, CA · 95129

415-857-4246

Armbien F Sabillo

Reg. 79844

Patent attorney

Neurocrine Biosciences, Inc.

San Diego, CA · 92130

858-378-0833

Gurjeev K Sachdeva

Reg. 37434

Patent attorney

San Francisco, CA · 94109

415-447-3913

Edward Egon Sachs

Reg. 20457

Patent attorney

Santa Barbara, CA · 93105

805-966-3833

Jonathan H Sachs

Reg. 57904

Patent attorney

Fair Oaks, CA · 95628

916-903-7531

Robert Reid Sachs

Reg. 42120

Patent attorney

Robert R. Sachs PC

San Francisco, CA · 94114

415-259-5775

Gisu Sadaghiani

Reg. 63505

Patent attorney

San Jose, CA · 95129

415-956-1900

Bhanu K Sadasivan

Reg. 61561

Patent attorney

McDermott Will & Schulte LLP

Menlo Park, CA · 94025

650-815-7537

David A Sadewasser

Reg. 55587

Patent agent

Foley & Lardner LLP

Palo Alto, CA · 94304

650-856-3700

Cathryn Marie Sadler

Reg. 50669

Patent attorney

Morrison and Foerster

Palo Alto, CA · 94304

650-813-5749

B J Sadoff

Reg. 36663

Patent attorney

Jewel Box IP

Capitola, CA · 95010

301-920-9799

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.