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 Mozilla Corporation, Hologic, Inc, and Law Office of Michael W. Landry.

Top cities in California

All practitioners in California

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

Maria Louisa Lao

Reg. 55358

Patent agent

San Jose, CA · 95112

516-578-2974

Mariette A Lapiz

Reg. 44202

Patent agent

Angiogenix, Inc.

Burlingame, CA · 94010

650-552-0766

Lawrence R LaPorte

Reg. 38948

Patent attorney

Manatt, Phelps & Phillips, LLP

Los Angeles, CA · 90064-1631

310-312-4000

Matthew C Lapple

Reg. 44203

Patent attorney

Lapple Ubell IP Law, LLP

Irvine, CA · 92612

949--75-6-4889

Alan G. Laquer

Reg. 63635

Patent attorney

Knobbe Martens

Irvine, CA · 92614

949-760-0404

Samuel W. Lardy

Reg. 79062

Patent agent

La Jolla, CA · 92037

612-961-3321

Craig C Largent

Reg. 56400

Patent attorney

Kilpatrick Townsend & Stockton LLP

Menlo Park, CA · 94025

650-326-2400

Hannah G. Largoza

Reg. 80459

Patent agent

Duarte, CA · 91010

323-673-1374

Sonia Lari

Reg. 67142

Patent attorney

Revelyst Operations LLC

Irvine, CA · 92606

760-930-5203

Kristoffer S Larsen

Reg. 66860

Patent agent

Orangvale, CA · 95662

415-506-7676

Michael J Larsen

Reg. 66280

Patent agent

Coastal Patent, LLC

San Diego, CA · 92193

858-565-4730

Christopher L Larson

Reg. 68243

Patent attorney

Fenwick & West LLP

San Francisco, CA · 94104

415-875-2300

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.