California

Patent attorneys in California

California hosts 9,567 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 salesforce.com, inc., KILPATRICK TOWNSEND & STOCKTON, LLP, and tonyguo.com.

Top cities in California

All practitioners in California

Michael J Guo

Reg. 67128

Patent attorney

salesforce.com, inc.

San Francisco, CA · 94105

415-819-4397

Richard M. Guo

Reg. 66055

Patent attorney

KILPATRICK TOWNSEND & STOCKTON, LLP

Palo Alto, CA · 94301

650-326-2400

Tony S Guo

Reg. 70644

Patent attorney

tonyguo.com

Sacramento, CA · 95820

415-890-4145

Wei Guo

Reg. 84649

Patent agent

Alameda, CA · 94501

469-422-9175

Yuan Guo

Reg. 69421

Patent agent

Loza & Loza LLP

Upland, CA · 91786

714-453-9824

Yuntao Guo

Reg. 60560

Patent attorney

The Law Office of Daniel Guo, P.C.

San Diego, CA · 92130

858-869-9208

Anil Gupta

Reg. 64218

Patent agent

Saratoga, CA · 95070

408-406-9913

Anirma R Gupta

Reg. 38275

Patent attorney

Palo Alto, CA · 94303

650-324-2444

Anvita Gupta

Reg. 84366

Patent agent

Sacramento, CA · 95827

505-285-7103

Maneesh Gupta

Reg. 62657

Patent attorney

Proteus Digital Health

Redwood City, CA · 94065

650-637-6119

Moulshri Gupta

Reg. L1313

Limited recognition

Qualcomm Incorporated

Santa Clara, CA · 95054

408-546-2027

Nimesh Gupta

Reg. 64937

Patent attorney

Milpitas, CA · 95035

408-813-4503

Praveer K Gupta

Reg. 75977

Patent agent

Ripple Enterprises LLC

San Jose, CA · 95113

917-214-1961

Sanskriti Gupta

Reg. 901043

Limited recognition

Thomas Jefferson School of Law

San Diego, CA · 92101

217-974-5702

Utsav Gupta

Reg. 72526

Patent attorney

Tensegrity Law Group

Redwood Shores, CA · 94065

650-802-6022

Amir J Guri

Reg. 68764

Patent agent

San Diego, CA · 92109

856-912-7267

Jon W Gurka

Reg. 44139

Patent attorney

Crowell & Moring LLP

Irvine, CA · 92614

949-798-1331

Kyle A Gurley

Reg. 71101

Patent agent

Bozicevoic, Field & Francis LLP

Parkway City, CA · 94065

650-327-3400

Daniel B. Gurman

Reg. 64105

Patent attorney

Adeia Inc

San Jose, CA · 95134

408-473-2500

Rajagopal Gururajan

Reg. 52977

Patent agent

San Jose, CA · 95118

408-265-4938

Vladimir Y Gusev

Reg. 59689

Patent attorney

Polygon lP LLP

Walnut Creek, CA · 94597

650-226-4351

Gloria Melinda Gusler

Reg. 50282

Patent attorney

Cupertino, CA · 95014

650-383-7164

Bryan C. Gusman

Reg. 79796

Patent attorney

Coleman & Horowitt LLP

Fresno, CA · 93704

559-248-4820

Michael A Guth

Reg. 45983

Patent attorney

Santa Cruz, CA · 95062

831-462-8270

Gregory D. Gutierrez

Reg. 76026

Patent attorney

Goodwin Procter LLP

Santa Monica, CA · 90401

424-436-3193

James T Gutierrez

Reg. 68940

Patent attorney

Qualcomm Inc.

San Diego, CA · 92121

858-845-3073

Jonathan P Gutierrez

Reg. 84388

Patent attorney

SoCal IP Law Group LLC

Westlake Village, CA · 91362

805-267-2263

Peter J Gutierrez· III

Reg. 56732

Patent attorney

Garson & Gutierrez, PC

San Diego, CA · 92101

619-324-3198

Siegmund Y Gutman

Reg. 46304

Patent attorney

Proskauer Rose LLP

Los Angeles, CA · 90067-3206

310-284-4533

George H Guy· III

Reg. 35886

Patent attorney

Baker Botts L.L.P.

Palo Alto, CA · 94304

650-739-7500

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?

9,567 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.