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 Adeia Inc., Squire Patton Bogg (US) LLP, and Wilson Sonsini Goodrick & Rosati.

Top cities in California

All practitioners in California

Michael A Morales

Reg. 76920

Patent attorney

Adeia Inc.

San Jose, CA · 95134

408-473-2668

Norman L Morales

Reg. 55463

Patent attorney

Squire Patton Bogg (US) LLP

San Francisco, CA · 94111

415-393-9857

Ricardo M Morales

Reg. 84739

Patent agent

Lake Elsinore, CA · 92530

951-956-1117

Tom M Moran

Reg. 26314

Patent attorney

Moutain View, CA · 94040

650-224-1099

Michael R. Morey

Reg. 71887

Patent agent

Palo Alto, CA · 94306

949-521-3745

Darcie L Morgan

Reg. 50889

Patent agent

Glendale, CA · 91206

818-291-0316

Natalie J Morgan

Reg. 52050

Patent attorney

Wilson Sonsini Goodrick & Rosati

San Diego, CA · 92130

858-350-2300

Russell T Morgan

Reg. 43815

Patent attorney

Half Moon Bay, CA · 94019

650-703-9827

Travers R. Morgan

Reg. 75287

Patent agent

MOSM LLP

Newport Beach, CA · 92663

949-674-6499

Richard Morganstern

Reg. 24736

Patent attorney

Law Offices Of Richard Morganstern

Los Angeles, CA · 90049

310-476-3290

Emanuel Morgenstern

Reg. 46074

Patent attorney

Playa Del Rey, CA · 90293

310-822-1049

Clint R Morin

Reg. 63705

Patent attorney

Qualcomm Inc.

San Diego, CA · 92121

858-845-7413

Philip A Morin

Reg. 45926

Patent attorney

Perkins Coie LLP

San Diego, CA · 92130-2080

858-720-5700

Fay E Morisseau· III

Reg. 29569

Patent attorney

McDermott Will and Emery

Irvine, CA · 92612

949-757-7115

Frank G Morkunas

Reg. 38974

Patent attorney

San Diego, CA · 92120

619-501-1888

Kimberlin L Morley

Reg. 35391

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320

805-447-5375

Marc T Morley

Reg. 52051

Patent attorney

Mintz Levin Cohn Ferris Glovsky and Popeo PC

San Diego, CA · 92130

858-314-1500

Christopher M Moropoulos

Reg. 42016

Patent attorney

Element Legal Group

Belmont, CA · 94002

650-453-1122

Robert B Morrill

Reg. 43817

Patent attorney

Sidley Austin LLP

Palo Alto, CA · 94304

(65-0)5-65-7010

Aaron L Morris

Reg. 80821

Patent attorney

Reichman Jorgensen Lehman & Feldberg LLP

Redwood City, CA · 94065

650-623-5076

Anthony R. Morris

Reg. 59941

Patent attorney

Apple Inc.

Cupertino, CA · 95014

858-319-2072

Elizabeth M N Morris

Reg. 54323

Patent agent

KlA-Tencor Corporation

Milpitas, CA · 95035

408-875-1569

Marc Morris

Reg. 38976

Patent attorney

McKool Smith Hennigan

Los Angeles, CA · 90017

213-694-1076

Patrick Dwayne Morris

Reg. 53351

Patent attorney

Pacific Biosciences of California, Inc.

Menlo Park, CA · 94025

650-521-8242

Roberta J Morris

Reg. 33196

Patent attorney

Menlo Park, CA · 94025

William C Morrison

Reg. 59448

Patent attorney

Illumina, Inc.

San Diego, CA · 92122

858-255-5199

John Joseph Morrissey· Jr

Reg. 26208

Patent attorney

Palo Alto, CA · 94306

650-857-0935

Colin W Morrow

Reg. 69074

Patent attorney

Ukiah, CA · 95482

707--38-0-1070

Loni L Morrow

Reg. 72529

Patent attorney

Knobbe Martens Olson and Bear, LLP

San Diego, CA · 92130

858-707-4000

Robert Harry Morse

Reg. 25358

Patent attorney

Esrom Consulting LLC

Redwood City, CA · 94062

650-260-2601

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.