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 Applied Materials, Inc., Wilson Sonsini Goodrich & Rosati, P.C., and Weaver Austin Villeneuve & Sampson LLP.

Top cities in California

All practitioners in California

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

San Francisco, CA · 94104

303-570-4636

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

Joseph J Mallon

Reg. 39287

Patent attorney

Knobbe, Martens, Olson & Bear LLP

Irvine, CA · 92614

858-707-4000

Thomas G Mallon

Reg. 66649

Patent attorney

Law Office of Thomas G. Mallon

Santa Clara, CA · 95051

408-910-0072

Martin I Mally

Reg. 46334

Patent agent

Merck and Co, Inc.

San Diego, CA · 92121

858-202-5411

Robert Edward Malm

Reg. 34662

Patent attorney

Pacific Palisades, CA · 90272

310-459-8728

Melissa L Malone

Reg. 56159

Patent attorney

Borson Law Group, PC

Lafayette, CA · 94549

925-310-2060

Richard D Malone

Reg. 51991

Patent attorney

Zumbrunn Law Corporation

Victorville, CA · 92393

760-245-5333

Patrick G Maloney

Reg. 67247

Patent attorney

Valley Glen, CA · 91401

858-254-1679

Phillip Dominick Mancini

Reg. 46743

Patent agent

Ojjo, Inc.

San Rafael, CA · 94903

415-786-4685

Michael J Mancuso

Reg. 54787

Patent attorney

ASML

San Diego, CA · 92127

185-886-95328

Saralynn Mandel

Reg. 31853

Patent attorney

MANDEL LAW OFFICE

Fair Oaks, CA · 95628

818-207-4980

Alec J. Mandell

Reg. 80469

Patent attorney

Edwards Lifesciences Corporation

Irvine, CA · 92614

949-400-9237

Lee Jay Mandell

Reg. 37176

Patent agent

Pacific Palisades, CA · 90272

424-272-9385

Jori K Mandelman

Reg. 44897

Patent attorney

San Francisco, CA · 94127

415-637-2633

Harish D Mandyam

Reg. 65386

Patent attorney

Mandyam

Marina del Rey, CA · 90292

310-822-5942

Lauren M. Mangano Drenkard

Reg. 76779

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320

555-120-80047

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.