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 Sheppard Mullin Richter & Hampton LLP, Irell & Manella LLP, and Pamela Gao Prof. Corp..

Top cities in California

All practitioners in California

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

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

Leland I. Gardner

Reg. 59512

Patent attorney

Google Inc.

Mountain View, CA · 94043

650-253-4750

Scott R. Gardner

Reg. 76548

Patent attorney

Squire Patton Boggs

Palo Alto, CA · 94304

757-581-2772

Michael G. Garelick

Reg. 72902

Patent agent

Prolacta Bioscience

Duarte, CA · 91010

626-599-9260

Jonathan M Garfinkel

Reg. 62519

Patent attorney

Convergence Intellectual Property Law

Los Altos, CA · 94024

650-383-7247

Aashish K Garg

Reg. 64479

Patent attorney

San Diego, CA · 92108

619-384-3590

Ankur Garg

Reg. 62463

Patent attorney

Dinsmore & Shohl LLP

San Diego, CA · 92101

619-400-0463

Terrence D Garnett

Reg. 44698

Patent attorney

Paul, Hastings, Janofsky & Walker LLP

Los Angeles, CA · 90071-2228

213-683-6000

Matthew R. Garnica

Reg. 80412

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2300

Lisa A Garono

Reg. 33177

Patent attorney

Haynes and Boone, LLP

San Jose, CA · 95110

408-660-4120

Michael S Garrabrants

Reg. 51230

Patent agent

Lattice Semiconductor Corporation

San Jose, CA · 95131

408-332-7341

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.