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 Procopio, Cory, Hargreaves & Savitch LLP, Caterpillar, Inc, and Dolby Laboratories, Inc..

Top cities in California

All practitioners in California

Robert K. Selfaison

Reg. 80108

Patent attorney

Procopio, Cory, Hargreaves & Savitch LLP

San Diego, CA · 92101

619-238-1900

Elise J. Selinger

Reg. 70022

Patent attorney

Caterpillar, Inc

San Diego, CA · 92122

254-297-6309

Linda Ya-Ning Selker

Reg. 43173

Patent attorney

Dolby Laboratories, Inc.

San Francisco, CA · 94103

415-645-5000

David F Selki

Reg. 50831

Patent attorney

Law Offices Of David F Selki

Los Angeles, CA · 90025

310-441-1111

Eric L Sellars

Reg. 68065

Patent agent

Cloudflare, Inc.

San Francisco, CA · 94107

214-232-8610

Abigail L. Sellers

Reg. 80391

Patent attorney

Irell & Manella LLP

Los Angeles, CA · 90067

310-203-7189

Allen J Seltzer

Reg. 66293

Patent agent

A & Y Services

Moorpark, CA · 93021

805-657-9888

Lulit Semunegus

Reg. 57693

Patent agent

BOEING

Huntington Beach, CA · 92647-2099

714-896-5336

Ilan Sendowski

Reg. 45849

Patent attorney

Sendowski, LLC

Reseda, CA · 91335

818-886-4153

Amber D. Senese

Reg. 83338

Patent agent

San Diego, CA · 92126

858-776-1016

Lopamudra Sengupta

Reg. 67753

Patent attorney

Zoom Video Communications, Inc

San Jose, CA · 95113

408-645-4873

Frances C. Senn

Reg. 84793

Patent attorney

Mintz

Los Angeles, CA · 90067

310-586-3207

Sean D Senn

Reg. 56747

Patent attorney

Archer Norris, A Professional Law Corporation

Los Angeles, CA · 90017

213-437-4000

Rachel J. Senturia

Reg. 72261

Patent agent

Wilson, Sonsini, Goodrich & Rosati

San Francisco, CA · 94105-1126

650-849-3248

Howard H Seo

Reg. 43106

Patent attorney

Qualcomm, Inc.

San Diego, CA · 92121

858-845-5235

Richard K. Seo

Reg. 77870

Patent agent

Diamond Bar, CA · 91765

909-753-4076

Peter K Seperack

Reg. 47932

Patent attorney

Lafayette, CA · 94549

925-482-7364

Antonia L Sequeira

Reg. 54670

Patent attorney

Fenwick and West

Mountain View, CA · 94041

650-335-7185

Franco A Serafini

Reg. 52207

Patent attorney

La Jolla, CA · 92037

858-456-2898

Gerard B. Serapiglia

Reg. 65177

Patent attorney

Gates & Cooper LLP

Los Angeles, CA · 90045

310-642-4153

David A. Serati

Reg. 78893

Patent attorney

Goodwin Procter LLP

Redwood City, CA · 94063-1621

650-752-3100

Steven C Sereboff

Reg. 37035

Patent attorney

So Cal IP Law Group LLP

Westlake Village, CA · 91362

805-230-1350

Michael R. Seringhaus

Reg. 76440

Patent attorney

Latham & Watkins LLP

Menlo Park, CA · 94025

650-328-4600

Todd Bruce Serota

Reg. 31421

Patent attorney

Law Offices of Todd B Serota

Manhattan Beach, CA · 90266

310-798-2004

Christopher Stockton Serra

Reg. 45088

Patent attorney

Lafayette, CA · 94549

858-692-2163

Cesar Richard Serrano

Reg. 901288

Limited recognition

University of San Diego School of Law

San Diego, CA · 92110

619-260-7470

Michael S Sertic

Reg. 61601

Patent attorney

Global Patent Group

Burbank, CA · 91506

314-812-8020

Anthony J Serventi

Reg. 42141

Patent attorney

Robert Bosch, LLC

Farmington Hills, CA · 48331

650-690-1682

Britten D Sessions

Reg. 68278

Patent attorney

Zilka-Kotab, PC

San Jose, CA · 95112

408-971-2573

Avinash Seth

Reg. 83926

Patent agent

Fish IP Law, LLP

Irvine, CA · 92612

949-943-8300

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?

9,553 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.