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 Fish and Richardson, P.C., Oxford Semiconductor, and Apple Inc..

Top cities in California

All practitioners in California

Brandy E. Gamblin

Reg. 80411

Patent agent

Fish and Richardson, P.C.

San Diego, CA · 92130-2245

858-847-4138

Jeffrey S Gananian

Reg. 33696

Patent attorney

Menlo Park, CA · 94025

650-576-9500

Vipul C Gandhi

Reg. 55197

Patent agent

Oxford Semiconductor

Irvine, CA · 92618

949-727-2020

Krithiga Ganesan

Reg. 75528

Patent agent

Apple Inc.

Cupertino, CA · 95014

669-218-3077

Eric Gani

Reg. 64936

Patent agent

Rancho Cucamonga, CA · 91730

909-529-0826

Peter Ganjian

Reg. 43991

Patent agent

PATENT LAW AGENCY, LLC

MONTROSE, CA · 91020-1626

818-248-1465

Catherine X. Gao

Reg. 83012

Patent agent

NVIDIA Corporation

Santa Clara, CA · 95051

408-486-2000

Chuan Gao

Reg. 54111

Patent attorney

KILPATRICK TOWNSEND & STOCKRON, LLP

San Francisco, CA · 94111

415-576-0200

Hua Gao

Reg. 40414

Patent agent

IP Voyage Consulting LLC

Sacramento, CA · 95816

510-270-7087

Huanyong Gao

Reg. 55199

Patent agent

Sheppard Mullin Richter & Hampton LLP

Los Angeles, CA · 90071

213-620-1780

Jie Gao

Reg. 73835

Patent attorney

Irell & Manella LLP

Newport Beach, CA · 92660

949-760-5155

Panpan Gao

Reg. 43626

Patent attorney

Pamela Gao Prof. Corp.

San Jose, CA · 95148

408-425-9836

Xiangling Gao

Reg. 800176

Limited recognition

Concord & Sage, PC

Diamond Bar, CA · 91765

619-732-6858

Xin Gao

Reg. 78115

Patent agent

Hayward, CA · 94542

415-810-7854

Maria-Emily R. Gapuzan

Reg. 63026

Patent agent

Ontario, CA · 91764

909-988-5159

Amy S Garber

Reg. 59815

Patent agent

Irvine, CA · 92618

419-410-2808

Edouard A Garcia

Reg. 38461

Patent attorney

Attorney At Law

Los Altos, CA · 94022

650-605-3532

Eric R Garcia

Reg. 69630

Patent attorney

Medtronic

Northridge, CA · 91325

805-704-0497

Guadalupe M Garcia

Reg. 50899

Patent attorney

Barcelo, Harrison, and Walker, LLP.

Palo Alto, CA · 94303

650-585-2933

Jessica Ann Garcia

Reg. 78116

Patent attorney

Kilpatrick Townsend & Stockton LLP

Menlo Park, CA · 94025

650-462-5322

Jose S Garcia

Reg. 43628

Patent attorney

Murabito Hao & Barnes LLP

SAN JOSE, CA · 95113

408-938-9060

Joslyn E. Garcia

Reg. 83163

Patent agent

Torrance, CA · 90501

310-720-7025

Mayra L. Garcia

Reg. 71597

Patent agent

Morrison & Foerster LLP

Palo Alto, CA · 94304

650-813-4297

Nicole R. Garcia

Reg. 83391

Patent attorney

Chula Vista, CA · 91910

619-361-6989

Vernon R Gard

Reg. 33886

Patent attorney

Gard & Kaslow LLP

Los Altos, CA · 94022

650-305-3050

Emily J Gardel

Reg. 75744

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320-1789

617-390-4338

Amanda Gardner

Reg. 68581

Patent agent

San Mateo, CA · 94402

650-345-0802

Diane L Gardner

Reg. 36518

Patent attorney

Mastermind IP Law P.C.

Covina, CA · 91723

803-226-0741

Elizabeth A Gardner

Reg. 36519

Patent attorney

ORRICK, HERRINGTON & SUTCLIFFE LLP

Irvine, CA · 92614

212-506-3593

Jared L Gardner

Reg. 70099

Patent attorney

Knobbe Martens Olson & Bear

Irvine, CA · 92614

949-760-0404

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.