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 University of San Francisco School of Law, Fulwider Patton LLP, and Pillsbury Winthrop Shaw Pittman LLP.

Top cities in California

All practitioners in California

Lance A Maish

Reg. 53256

Patent attorney

Laguna Niguel, CA · 92677

949-375-6015

Henna Maiwand

Reg. 902316

Limited recognition

University of San Francisco School of Law

San Francisco, CA · 94117-1080

916-276-4012

Thomas Henry Majcher

Reg. 31119

Patent attorney

Fulwider Patton LLP

Los Angeles, CA · 90045

310-824-5555

Arash Majdi

Reg. 74015

Patent agent

Pillsbury Winthrop Shaw Pittman LLP

San Diego, CA · 92130-4088

858-509-4015

Laura A Majerus

Reg. 33417

Patent attorney

San Mateo, CA · 94403

650-906-8839

Martin Frank Majestic

Reg. 25695

Patent attorney

Lafayette, CA · 94549

650-849-6600

Miriam E Majofis

Reg. 32480

Patent attorney

San Mateo, CA · 94402

650-344-7630

Danton K Mak

Reg. 31695

Patent attorney

Leech Tishman Fuscaldo & Lampl, LLP

Pasadena, CA · 91103-3842

626-796-4000

Evelyn C Mak

Reg. 50492

Patent attorney

SK hynix NAND Product Solutions Corp.

San Jose, CA · 95134

408-219-1807

Kayli S. Mak

Reg. 84215

Patent agent

Temple City, CA · 91780

626-905-0142

Kyoko C Makino

Reg. 72200

Patent agent

Kilpatrick Townsend & Stockton LLP

Los Angeles, CA · 90067

310-966-4940

Rebecca I. Makitalo

Reg. 80120

Patent agent

Cislo & Thomas, LLP

Los Angeles, CA · 90025

310-451-0647

Amit Makker

Reg. 68086

Patent attorney

Oakland, CA · 94610

310-720-2648

Ali Makoui

Reg. 45536

Patent attorney

Makoui Law, PC

Encino, CA · 91436

818-261-5998

David Norman Makous

Reg. 29559

Patent attorney

Pierson Ferdinand LLP

Beverly Hills, CA · 90212

310-974-3224

Swetha Vittal Maladkar

Reg. 800019

Limited recognition

Applied Materials, Inc.

Santa Clara, CA · 95054-3299

404-924-0607

Jora Malaky

Reg. 66825

Patent attorney

Granada Hills, CA · 91344

818-456-8603

Allyson K Malecha

Reg. 82832

Patent agent

Haynes and Boone LLP

San Francisco, CA · 94104

415-293-8900

James W. Malecha

Reg. 67939

Patent agent

Wilson Sonsini Goodrich & Rosati, P.C.

San Diego, CA · 92130

858-350-2300

Mark M Malek

Reg. 78727

Patent attorney

Escondido, CA · 92029

760-390-3244

Reena Malhotra

Reg. 63942

Patent agent

Weaver Austin Villeneuve & Sampson LLP

Oakland, CA · 94612

510-663-1100

Mark Malin

Reg. 41176

Patent attorney

Dewey Ballantine LLP

San Jose, CA · 95129

408-255-6113

Melanie R. Malinas

Reg. 82255

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

775-813-5268

Chester Paul Maliszewski

Reg. 51990

Patent agent

LeNK, Co.

Santa Barbara, CA · 93110

970-903-6778

Gerald William Maliszewski

Reg. 38054

Patent attorney

Law Office Of Gerald Maliszewski

San Diego, CA · 92198-2829

858-451-9950

Daniel J Malkin

Reg. 81881

Patent attorney

Kleinberg & Lerner, LLP

Los Angeles, CA · 90067-2501

310-557-1511

Roxana D. Malladi

Reg. 81634

Patent agent

Kilpatrick Stockton and Townsend

Walnut Creek, CA · 94596

925-472-4728

Ryan P Mallen

Reg. 55422

Patent attorney

Self

San Diego, CA · 92192

310-555-1212

Daniel C Mallery

Reg. 33532

Patent attorney

Valencia, CA · 91355

323-786-2811

Michael John Mallie

Reg. 36591

Patent attorney

Womble Bond Dickinson LLP

Palo Alto, CA · 94304

408-720-8300

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.