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 InTouch Technologies, Inc., Franklin & Associates International LLC, and WILSON SONSINI GOODRICH & ROSATI.

Top cities in California

All practitioners in California

Christopher M Lambrecht

Reg. 64725

Patent agent

InTouch Technologies, Inc.

Goleta, CA · 93117

805-562-8686

Matthew F Lambrinos

Reg. 56909

Patent agent

Franklin & Associates International LLC

Palo Alto, CA · 94301

650-391-7831

Jiarong L Lamiquiz

Reg. 73844

Patent attorney

WILSON SONSINI GOODRICH & ROSATI

Palo Alto, CA · 94304

650-849-3125

Eric Ross Lamison

Reg. 44859

Patent attorney

LAMISON PC

Orinda, CA · 94563

415-407-0596

Cynthia S. Lamon

Reg. 73334

Patent agent

Lamon Patent Services

WILLITS, CA · 95490

707-489-6455

Erin E. M. LaMontagne

Reg. 83317

Patent agent

San Diego, CA · 92111

714-514-1688

Sunny K LaMoreux

Reg. 47986

Patent attorney

SAUSD

Santa Ana, CA · 92704

949-923-1402

Thomas Raymond Lampe

Reg. 22454

Patent attorney

Bielen, Lampe & Thoeming

Concord, CA · 94520

925-288-9720

Gregory S Lampert

Reg. 35581

Patent attorney

LEWIS ROCA ROTHGERBER CHRISTIE LLP

Glendale, CA · 91209-9001

626-795-9900

Michael V Lancaster

Reg. 51915

Patent agent

Bakersfield, CA · 93306

760-417-9180

John Frederic Land

Reg. 29554

Patent attorney

Jaquez Land Greenhaus & McFarland LLP

San Diego, CA · 92121

858-453-2004

Joel G Landau

Reg. 54732

Patent attorney

Carpintieria, CA · 93014

818-739-9496

Joshua S. Landau

Reg. 71491

Patent attorney

Mozilla Corporation

San Francisco, CA · 94104

650-903-0800

Jeffrey E Landes

Reg. 55355

Patent attorney

Hologic, Inc

San Diego, CA · 92121

858-410-8369

Michelle P Landry

Reg. 60232

Patent agent

Law Office of Michael W. Landry

San Diego, CA · 92130

858-509-0197

Stacy M Landry

Reg. 42779

Patent attorney

Oakland, CA · 94619

510-919-1494

Jackson T. Lane

Reg. 82350

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-6325

Nathan Lane

Reg. 43738

Patent attorney

Belvedere, CA · 94920

415-269-0249

Timothy J Lane

Reg. 41927

Patent attorney

Irvine, CA · 92618-3364

949-872-9398

William Gregory Lane

Reg. 24761

Patent attorney

Law Office of William G. Lane

LaQuinta, CA · 92248

949-500-0407

David C Laney

Reg. 66859

Patent agent

Perkins Coie LLP

San Diego, CA · 92130-2594

858-720-5718

David M Lang

Reg. 53182

Patent attorney

Law Offices of David M. Lang

Granite Bay, CA · 95746

916-317-4375

Jeremy J. Lang

Reg. 73604

Patent attorney

ORRICK, HERRINGTON & SUTCLIFFE LLP

IRVINE, CA · 92614

650-614-7427

Kevin C Lange

Reg. 80900

Patent agent

Goodwin Procter LLP

San Francisco, CA · 94105

415-733-6122

Mark J Lange

Reg. 72695

Patent agent

Malibu, CA · 90265

310-457-3698

Todd J Langford

Reg. 60709

Patent attorney

San Diego, CA · 92127

858-518-1088

Stuart T Langley

Reg. 33940

Patent attorney

The Walt Disney Company

Burbank, CA · 91521

818-560-8452

Grant T Langton

Reg. 39739

Patent attorney

Snell & Wilmer, L.L.P.

Los Angeles, CA · 90071-3406

213-929-2505

Veronica B Lanier

Reg. 39262

Patent agent

Livermore, CA · 94550

925-443-2510

Brian J Lao

Reg. 69869

Patent agent

San Diego, CA · 92129

858-382-7588

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.