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 Illumina, Inc., Wilson Sonsini Goodrich & Rosati, and Brownstein Hyatt Farber Schreck, LLP.

Top cities in California

All practitioners in California

Michael Patrick Reed

Reg. 45647

Patent attorney

Illumina, Inc.

San Diego, CA · 92122

858-255-5298

Sean A. Reed

Reg. 75424

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2384

Dianne Mary Rees

Reg. 45281

Patent agent

San Diego, CA · 92122

858-320-0045

Marcus E. Reeslund

Reg. 59394

Patent attorney

Brownstein Hyatt Farber Schreck, LLP

Los Angeles, CA · 90067-2918

310-500-4600

Alina S Reeves

Reg. 64495

Patent attorney

Alameda, CA · 94501

312-576-6752

Andrew D Regan

Reg. 66970

Patent attorney

Ohalo Genetics, Inc.

Aptos, CA · 95003

404-858-3188

Martin W Regehr

Reg. 73655

Patent attorney

Christie, Parker and Hale

Glendale, CA · 91203

626-683-4534

Panchanathan Reghunathan

Reg. 62127

Patent attorney

Nathan Law Corporation

Camarillo, CA · 93010

818-634-7529

Syed T M Rehan

Reg. 84867

Patent agent

Encinitas, CA · 92024

760-475-7273

Kristen P. Lantz Reichenbach

Reg. 61162

Patent attorney

Kirkland & Ellis LLP

San Francisco, CA · 94102

415-439-1683

Derrick Michael Reid

Reg. 32096

Patent attorney

Laguna Beach, CA · 92651

Joseph P Reid

Reg. 72317

Patent attorney

Perkins Coie, LLP

San Diego, CA · 92130

858-720-5764

Renee Rea Reid

Reg. 52159

Patent agent

Samsung Electronics

San Jose, CA · 95134

408-544-4476

Robert A Reid

Reg. 63879

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-651-1945

Scott William Reid

Reg. 48097

Patent agent

Neurocrine Biosciences, Inc.

San Diego, CA · 92130

858-500-9986

Charles F Reidelbach· Jr

Reg. 36649

Patent attorney

Higgs Fletcher and Mack LLP

San Diego, CA · 92101

619-236-1551

Joseph F Reidy

Reg. 39340

Patent attorney

Bristol Myers Squibb Company

San Diego, CA · 92121

858-682-6619

Coleman F Reif

Reg. 38593

Patent agent

Coleman Reif

San Jose, CA · 95124

408-266-1396

Jerrold Brendan Reilly

Reg. 32293

Patent attorney

Mag Instrument, Inc.

Ontario, CA · 917661

909-947-1006

Patrick T Reilly

Reg. 37427

Patent attorney

Santa Cruz, CA · 95061-7218

831-332-7127

Philip David Reilly

Reg. 41415

Patent attorney

MacuSight, Inc

Union City, CA · 94587

510-400-1424

William S Reimus

Reg. 38279

Patent attorney

Taylor Made Golf Company, Inc.

Carlsbad, CA · 92008

760-918-6234

Andrew E Reiner

Reg. 47895

Patent attorney

Rayman and Reiner

Los Angeles, CA · 90067

310-553-3800

Ryan A. Reis

Reg. 80997

Patent attorney

Acushnet Company

Carlsbad, CA · 92010

760-603-5260

Joseph Meyer Reisman

Reg. 43878

Patent attorney

Knobbe, Martens, Olson & Bear LLP

San Diego, CA · 92130

858-707-4000

Steven M Reiss

Reg. 37519

Patent attorney

ScienBiziP, PC

Los Angeles, CA · 90071

213-426-1780

Peter Jerome Reitan

Reg. 48603

Patent attorney

Irvine, CA · 92604

714-809-7363

Bernard A Reiter

Reg. 21151

Patent attorney

Rancho Mirage, CA · 92270

760-904-8678

Stephen Elliott Reiter

Reg. 31192

Patent attorney

Kilpatrick Townsend & Stockton LLP

San Diego, CA · 92130

858-350-6100

Norman Ernest Reitz

Reg. 24879

Patent attorney

Hayward, CA · 94545

510-732-9940

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.