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 Law Office of Michelle Lau, Haley Guiliano LLP, and Morgan, Lewis & Bockius LLP.

Top cities in California

All practitioners in California

Michelle C Lau

Reg. 57616

Patent attorney

Law Office of Michelle Lau

Sacramento, CA · 95814

916-717-9720

Yee J. Lau

Reg. 83063

Patent agent

Haley Guiliano LLP

San Jose, CA · 95113

972-800-4925

Sam Edward Laub

Reg. 22355

Patent attorney

San Diego, CA · 92106-2440

408-313-4233

Soyeon Laub

Reg. 39266

Patent attorney

Morgan, Lewis & Bockius LLP

Costa Mesa, CA · 92626

714-830-0512

Leona Lamont Lauder

Reg. 30863

Patent attorney

Law Offices of Leona L Lauder

Tiburon, CA · 94920

415-889-5201

Mark A Lauer

Reg. 36578

Patent attorney

Silicon Edge Law Group LLP

Pleasanton, CA · 94588

925-621-2121

Elizabeth A Laughton

Reg. 70484

Patent attorney

Los Angeles, CA · 90024

703-585-8839

Steven Laut

Reg. 47736

Patent attorney

Sherman IP LLP

Los Angeles, CA · 91436

424-229-6802

Patrick J. Lavender

Reg. 58758

Patent attorney

The Patent Shoppe

San Diego, CA · 92130

858-880-6183

Thomas F. Lavery

Reg. 73021

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320

805-447-7259

Michael A Lavine

Reg. 69917

Patent attorney

JONES DAY

SAN FRANCISCO, CA · 94104

415-875-5857

Hung-fai S Law

Reg. 71978

Patent agent

Chiltek LLC

Los Altos, CA · 94024

650-279-5838

Peter J Law

Reg. 72722

Patent attorney

Knobbe, Martens, Olson and Bear

Irvine, CA · 92614

858-707-4243

Don Carlos Lawrence

Reg. 31975

Patent attorney

Haynes and Boone, LLP

Costa Mesa, CA · 92626

949-202-3000

Scott W Laws

Reg. 51111

Patent attorney

Carlsbad, CA · 92011

760-994-7317

Tara M Lay

Reg. 70171

Patent attorney

Affirm, Inc.

San Francisco, CA · 94108

704-439-6141

Spyros James Lazaris

Reg. 45981

Patent attorney

Lazaris IP, Inc.

Los Angeles, CA · 90045

310-889-0740

Han K. Le

Reg. 82779

Patent agent

Berkeley, CA · 94709

714-333-8348

Kevin Le

Reg. 79420

Patent agent

San Leandro, CA · 94578

510-303-2996

Trung-Kien T Le

Reg. 44863

Patent attorney

The Aerospace Corporation

El Segundo, CA · 90245

310-336-6242

Uyen D Le

Reg. 58214

Patent attorney

The Law Office of Uyen D. Le

San Diego, CA · 92105

619-283-2808

Stephen J Le Blanc

Reg. 36579

Patent attorney

Law Offices of Stephen J. LeBlanc

Oakland, CA · 94612

510-388-7089

Arthur E Leach

Reg. 48566

Patent attorney

Glendora, CA · 91741

626-335-2314

Erin M B Leach

Reg. 67666

Patent agent

Orrick, Herrington, and Sutcliffe LLP

Irvine, CA · 92614

949-852-7766

Nicholas Nathaniel Leach

Reg. 31776

Patent attorney

Chevron Corporation

San Ramon, CA · 94583-2324

925-842-1534

Nathaniel T Leachman

Reg. 68911

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2227

Peter Rocco Leal

Reg. 24226

Patent attorney

Power Integrations

Auburn, CA · 95603

408-414-9517

George Brian Leavell

Reg. 45436

Patent attorney

Law Office of George Leavell

Merced, CA · 95340

408-710-2532

Thomas F Lebens

Reg. 38221

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

San Luis Obispo, CA · 93403-3856

805-548-1800

Jonathan L Lederman

Reg. 67572

Patent attorney

Sunnyvale, CA · 94087

650-793-5518

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.