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 Morgan, Lewis & Bockius LLP, Invoke, and Paul Hastings LLP.

Top cities in California

All practitioners in California

Michael C Brandt

Reg. 65476

Patent attorney

Invoke

Danville, CA · 94526

408-320-6603

Elizabeth L Brann

Reg. 63987

Patent attorney

Paul Hastings LLP

San Diego, CA · 92121

858-458-3000

Sarah J Brashears

Reg. 38087

Patent attorney

Convergent Law Group LLP

Mountain View, CA · 94043

650-641-2236

Gabor Brasnjo

Reg. 72036

Patent attorney

San Francisco, CA · 94132

650-285-2209

Adam R Brausa

Reg. 60287

Patent attorney

Durie Tangri LLP

San Francisco, CA · 94111

415-362-6666

Melissa J Brayman

Reg. 68142

Patent attorney

Mintz Levin Cohn Ferris Glovsky and Popeo PC

San Diego, CA · 92130

858-314-1500

David C Brayton

Reg. 41634

Patent attorney

Law Office of David C. Brayton

Sebastopol, CA · 95472

369-210-8648

Billie T Brazil

Reg. 50733

Patent agent

Dupont Industrial Biosciences

Palo Alto, CA · 94304

650-846-7639

David M. Breaux

Reg. 74799

Patent agent

kensington, CA · 94707

936-499-5175

Daniel P Brecht

Reg. 58708

Patent attorney

San Diego IP Law Group LLP

San Diego, CA · 92130

000-000-0000

Dion M Bregman

Reg. 45645

Patent attorney

Morgan, Lewis & Bockius LLP

Palo Alto, CA · 94306

650-843-4000

Adam M Breier

Reg. 63718

Patent agent

McNeill PLLC

San Diego, CA · 92019

619-588-2849

Jerome Louis Brekken

Reg. 56510

Patent agent

Valley Center, CA · 92082

760-533-8822

Bryan P. Brennan

Reg. 84086

Patent agent

San Francisco, CA · 94107

916-606-0872

Joseph F. X. Brennan

Reg. 62403

Patent attorney

Ahmann Kloke LLP

Palo Alto, CA · 94301

650-485-2809

Sean M Brennan

Reg. 39917

Patent agent

Brennan IP Services

Sonora, CA · 95370

209-533-2564

Derrick V. Breska

Reg. 74266

Patent agent

Zilka Kotab, P.C.

San Jose, CA · 95112

408-971-2573

Nicholas J Breska

Reg. 78422

Patent attorney

Nixon Peabody LLC

San Francisco, CA · 94111

415-984-8443

Matthew John Bresnahan

Reg. 62452

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2226

Todd E Breuer

Reg. 67496

Patent attorney

San Francisco, CA · 94133

917-280-5896

Marc M. Breverman

Reg. 67470

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-974-7892

Victoria L. Breves

Reg. 47823

Patent attorney

Revance Therapeutics, INC.

Newark, CA · 94560

510-742-3550

Douglas Brian Brewer

Reg. 68697

Patent attorney

Indian Wells, CA · 92210

760-360-2400

Robin L. Brewer

Reg. 60951

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-7000

Rick G Brewster

Reg. 35077

Patent agent

R G Brewster IP

Cupertino, CA · 95014

408-857-7814

David Jay Brezner

Reg. 24774

Patent attorney

Morgan, Lewis & Bockius LLP

San Francisco, CA · 94105

415-442-1174

Richard C Bridgeman

Reg. 57773

Patent agent

Patent Crafters

Carlsbad, CA · 92010

408-309-3388

Nadeem G Bridi

Reg. 42361

Patent attorney

Leica Biosystems

Vista, CA · 92081

210-488-5616

John F Brigden

Reg. 40530

Patent attorney

Wentworth Digital

Menlo Park, CA · 94025

650-575-6280

Thomas A Briggs

Reg. 38391

Patent attorney

Jones Day

San Diego, CA · 92121

858-314-1164

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.