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 RPX Corporation, KENJA IP Law PC, and Haynes and Boone, LLP.

Top cities in California

All practitioners in California

Bita Mortazavi

Reg. 75107

Patent agent

RPX Corporation

San Francisco, CA · 94105

415-852-3125

Eric K Morton

Reg. 54588

Patent attorney

KENJA IP Law PC

San Jose, CA · 95113

650-561-4758

Howard Edward Morton

Reg. 37401

Patent agent

Carmel Valley, CA · 93924

831-659-8218

Jeffrey David Morton

Reg. 77476

Patent attorney

Haynes and Boone, LLP

Costa Mesa, CA · 92626

949-202-3082

Matthew A Moses

Reg. 70359

Patent attorney

Irvine, CA · 92603

949-439-0726

Arya N Moshiri

Reg. 77164

Patent attorney

Baker Botts LLP

San Francisco, CA · 94111

415-291-6223

Alex P Moskovitz

Reg. 62338

Patent attorney

Cambria, CA · 93428

510-684-9079

Larry J Moskowitz

Reg. 42911

Patent attorney

San Diego, CA · 92127

858-832-7266

John L Mosley

Reg. 81191

Patent agent

Eversheds Sutherland LLP

San Diego, CA · 92130

858-769-3081

Ralph Leonard Mossino

Reg. 22682

Patent agent

Danville, CA · 94506

925-820-3850

Amy R. Motomura

Reg. 70897

Patent attorney

Los Angeles, CA · 90015

213-736-8134

Amal Moulik

Reg. 44424

Patent agent

Walnut Creek, CA · 94595

510-295-8061

Elizabeth R Moulton

Reg. 62482

Patent attorney

Orrick Herringfton & Sutcliffe, LLP

Menlo Park, CA · 94025

612-720-9187

Neil R Mouneimne

Reg. 76501

Patent attorney

La Canada Flintridge, CA · 91011-2839

626-765-1148

Emily G. Mouser

Reg. 83534

Patent attorney

Knobbe Martens Olson & Bear

Irvine, CA · 92614

949-760-0404

Hamid R. Moussavian

Reg. 64986

Patent attorney

Westlake Village, CA · 91361

818-735-9505

Nicholas P. Mouton

Reg. 75306

Patent attorney

Mintz Levin Cohn Ferris Glovsky and Popeo, P.C.

San Diego, CA · 92130

858-314-1500

Shao-Fei Moy

Reg. 68643

Patent attorney

Dergosits & Noah LLP

San Francisco, CA · 94111

415-705-6377

Stephen E Moyer

Reg. 67398

Patent attorney

Pfizer, Inc.

South San Francisco, CA · 94080

650-615-7567

Kari A Moyer-Henry

Reg. 64182

Patent attorney

Lewis Kohn & Fitzwilliam LLP

San Diego, CA · 92130

858-436-1334

Steven I Mozsgai

Reg. 56690

Patent agent

Grant Anderson, LLP

Carlsbad, CA · 92010

858-623-3240

Douglas G Muehlhauser

Reg. 42018

Patent attorney

Newport Beach, CA · 92660

949-698-2116

Michael M Mueller

Reg. 67355

Patent attorney

San Diego, CA · 92150

858-376-2641

Daryl D Muenchau

Reg. 36616

Patent attorney

San Diego, CA · 92106

858-752-8123

Joseph Edward Mueth

Reg. 20532

Patent attorney

Joseph E. Mueth Law Corporation

Pasadena, CA · 91103

626-584-0396

Sharon E. G. Mughal

Reg. 59816

Patent attorney

Medtronic MiniMed, Inc.

Northridge, CA · 91325

818-576-5525

Ryann M. Muir

Reg. 78832

Patent attorney

Gilead Sciences, Inc.

Foster City, CA · 94404

650-524-3920

Kshithija Mulam

Reg. 83552

Patent agent

Atherton, CA · 94027

408-221-7425

Jeremy J Mulder

Reg. 58016

Patent attorney

Berkeley, CA · 94704

734-716-4476

Jayanti Muliyil

Reg. 69044

Patent attorney

Castro Valley, CA · 94546

415-702-0581

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.