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 Jones Day, Qualcomm Inc., and Parsons Corp..

Top cities in California

All practitioners in California

Ria C Momblanco

Reg. 54319

Patent attorney

Jones Day

Irvine, CA · 92614

949-553-7580

Brian L. Momeyer

Reg. 69507

Patent attorney

Qualcomm Inc.

San Diego, CA · 92121

619-885-0397

Christopher G. Monahan

Reg. 79425

Patent attorney

Parsons Corp.

Pasadena, CA · 91124

626-440-2164

Bishwarup Mondal

Reg. 74381

Patent agent

San Ramon, CA · 94583

412-266-4396

Jose G Moniz

Reg. 50192

Patent agent

Rambus Inc.

San Jose, CA · 95134

650-492-1798

Wesley W Monroe

Reg. 39778

Patent attorney

Christie Parker & Hale, LLP

Glendale, CA · 91203-1445

626-683-4520

Gladys H Monroy

Reg. 32430

Patent attorney

Atherton, CA · 94027

650-283-2614

Joanne van Erp Montague

Reg. 61279

Patent agent

Santa Barbara, CA · 93105

425-869-5000

David M. Montelongo

Reg. 76477

Patent agent

Patterson, CA · 95363

925-290-8107

Leo R Montenegro

Reg. 43811

Patent attorney

Social Security Administration

San Francisco, CA · 94105

415-977-8931

Hanna Elizabeth B Montgomery

Reg. 81668

Patent attorney

U.S. Government

San Diego, CA · 92110

619-524-7061

Wayne Weaver Montgomery

Reg. 35016

Patent attorney

Wayne W. Montgomery

Palo Alto, CA · 94306

650-858-2092

Dominic F Montisano

Reg. 43812

Patent agent

Montisano

San Diego, CA · 92117

858-274-5724

Vanintheran Moodley

Reg. 56631

Patent attorney

HM Law Group LLP

San Jose, CA · 95014

408-713-1983

Leslie Ann Mooi

Reg. 37047

Patent attorney

Geron Corporation

Menlo Park, CA · 94025

650-473-7106

Bo Kyoung Moon

Reg. 82264

Patent attorney

O'Melveny & Myers LLP

Newport Beach, CA · 92660

949-823-7183

C Preston Moon

Reg. 50718

Patent agent

San Luis Obispo, CA · 93401

703-861-0936

Sangwook Moon

Reg. 62673

Patent agent

San Francisco, CA · 94115

415-323-8345

Sung J. Moon

Reg. 73191

Patent agent

Santa Monica, CA · 90404

530-713-9852

Susan C Moon

Reg. 66933

Patent attorney

Canon U.S.A., Inc.

Irvine, CA · 92618

949-932-3309

Arthur B Moore

Reg. 29958

Patent attorney

Foley & Lardner

Los Angeles, CA · 90071-2411

213-972-4552

Brent C Moore

Reg. 55461

Patent attorney

Illumina, Inc

San Diego, CA · 92122

858-736-3538

Cynthia R Moore

Reg. 46086

Patent attorney

Palo Alto, CA · 94306

650-565-8185

Eric J Moore

Reg. 54321

Patent attorney

La Canada, CA · 91011

626-831-2981

Joanna L Moore

Reg. 44950

Patent attorney

Amylin Pharmaceuticals, Inc.

San Diego, CA · 92121

858-642-7012

Julian D Moore

Reg. 77004

Patent attorney

Twitter, Inc.

San Francisco, CA · 94103

415-792-5744

Niki K Moore

Reg. 65391

Patent attorney

Wilmer Cutler Pickering Hale and Dorr LLP

Palo Alto, CA · 94304

650-858-6108

Leeron Morad

Reg. 69554

Patent attorney

Google, LLC

Mountain View, CA · 94043

650-253-0000

Payam Moradian

Reg. 52048

Patent attorney

MORADIAN LAW

Los Angeles, CA · 90024

917-353-1919

Ashley C. Morales

Reg. 80326

Patent attorney

Knobbe Martens Olson & Bear LLP

Irvine, CA · 92614

858-707-4022

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.