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 Morrison & Foerster LLP, Muramatsu & Associates, and Gordon & Rees, LLP.

Top cities in California

All practitioners in California

Patrick J. Mulkern

Reg. 75794

Patent attorney

Gordon & Rees, LLP

San Diego, CA · 92101

619-230-7739

William Anthony Mullee

Reg. 42019

Patent agent

Huntington Beach, CA · 92646

714-962-1542

James J Mullen· III

Reg. 44957

Patent attorney

Morrison & Foerster LLP

San Diego, CA · 92130

858-720-7940

Lee Mullen

Reg. 46363

Patent attorney

Sonora, CA · 95370

209-533-0494

Kurt Timothy Mulville

Reg. 37194

Patent attorney

VLP Law Group

Newport Beach, CA · 92663

949-531-6450

Gregory J Munchinsky

Reg. 80623

Patent agent

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

858-707-4000

Alejandro D. Munoz

Reg. 63534

Patent attorney

Futurewei Technologies, Inc.

Santa Clara, CA · 95050

408-330-4903

Avery B Munoz

Reg. 63909

Patent agent

University of California, Santa Barbara

Santa Barbara, CA · 93106

805-893-7370

Kristen A. Munoz

Reg. 83451

Patent agent

Morrison and Foerster

Los Angeles, CA · 90017

213-344-6490

Jack Calvin Munro

Reg. 22979

Patent agent

Pauma Valley, CA · 92061

760-345-6556

Steven John Munson

Reg. 47812

Patent attorney

Martinez, CA · 94553

503-939-3005

Lucia N Muntean

Reg. 69481

Patent agent

Gilead Sciences, Inc.

Foster City, CA · 94404

650-522-5813

Anthony Charles Murabito

Reg. 35295

Patent attorney

Murabito, Hao & Barnes, LLP

Campbell, CA · 95008

408-938-9060

Veeraperumanallur S. Muralidharan

Reg. 64308

Patent agent

Santa Clara, CA · 95051

408-821-3568

Hideki Muramatsu

Reg. 45577

Patent attorney

Muramatsu & Associates

Foothill Ranch, CA · 92610

949-726-2348

Hisako Muramatsu

Reg. 34955

Patent attorney

Hisako Muramatsu, Esq.

Mission Viejo, CA · 92691

310-869-7159

Yasuo Muramatsu

Reg. 38684

Patent attorney

Muramatsu & Associates

Foothill Ranch, CA · 92610

949-726-2348

Kate Hilliker Murashige

Reg. 29959

Patent attorney

Morrison & Foerster LLP

San Diego, CA · 92130

858-720-5100

Angela D. Murch

Reg. 61216

Patent attorney

InCube Labs, LLC

San Jose, CA · 95131

408-457-3775

Keith M. Murdoch

Reg. 74891

Patent agent

Coherent Corp.

Santa Clara, CA · 95054

408-764-4824

Douglas Craig Murdock

Reg. 37549

Patent attorney

Douglas C. Murdock, APC

Cardiff, CA · 92007

760-815-7554

Mihai H. Murgulescu

Reg. 72512

Patent agent

San Jose, CA · 95213

408-667-7655

Anina D Murphy

Reg. 51049

Patent agent

Tethys Bioscience

Emeryville, CA · 94608

510-450-0675

Barbara Heaphy Murphy

Reg. 34619

Patent attorney

San Diego, CA · 92130

858-461-1583

David Brian Murphy

Reg. 31125

Patent attorney

O'Melveny & Myers, LLP

Newport Beach, CA · 92660

949-823-6960

Frederick V Murphy

Reg. 53357

Patent agent

Menlo Park, CA · 94025

650-323-3635

Grace R. Murphy

Reg. 84537

Patent agent

San Francisco, CA · 94122

415-213-5449

John T Murphy

Reg. 50583

Patent agent

Rancho Santa Fe, CA · 92067

760-504-7939

Matthew B Murphy

Reg. 39787

Patent attorney

10X Technologies, Inc.

Pleasanton, CA · 94566

925-401-7300 X 243

Michael Jay Murphy

Reg. 37404

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-493-9300

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.