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 Howrey LLP, Fisher & Phillips LLP, and Denali Therapeutics Inc..

Top cities in California

All practitioners in California

John T Lai

Reg. 72694

Patent attorney

Fisher & Phillips LLP

Irvine, CA · 92614

949-798-2109

Karen W Lai

Reg. 60920

Patent agent

Denali Therapeutics Inc.

South San Francisco, CA · 94080

650-457-4483

Kin Hung Lai

Reg. 69251

Patent agent

Cypress Semlconductor Corporation

San Jose, CA · 95134

408-545-6950

Patrick Lai

Reg. 65208

Patent attorney

ArentFox Schiff

Los Angeles, CA · 90013

213-443-7547

Sharon A. Lai

Reg. 62236

Patent attorney

Reed Smith LLP

Palo Alto, CA · 94304

650-352-0626

Shelley A. Lai

Reg. 76571

Patent attorney

Gilead Sciences, Inc.

Foster City, CA · 94404

650-372-7600

Jayne Laiprasert

Reg. 66789

Patent agent

Howrey LLP

San Francisco, CA · 94105

415-848-3241

Jason F. Lake

Reg. 61745

Patent attorney

Quinn Emanuel Urquhart & Sullivan

Los Angeles, CA · 90017

213-443-3000

Viswanathan Lakshmanan

Reg. 68587

Patent agent

Knobbe Martens Olson & Bear, LLP

SAN FRANCISCO, CA · 94104

415-954-4114

Preeti G Lal

Reg. 54249

Patent agent

Santa Clara, CA · 95054

408-980-1136

Amy Lam

Reg. 75223

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3057

Anna W Lam

Reg. 57518

Patent agent

Howrey LLP

East Palo Alto, CA · 94303

650-798-3652

Christine Shui-wah Lam

Reg. 37489

Patent attorney

Los Altos, CA · 94024

650-965-4097

Colin N. Lam

Reg. 84343

Patent agent

Redwood City, CA · 94061

650-245-4185

Joanne Chung Yan Lam

Reg. 69868

Patent attorney

Carr & Ferrell LLP

Menlo Park, CA · 94025

650-812-3487

Kendrick P. Lam

Reg. 71490

Patent agent

Torrance, CA · 90503

852-915-09858

Peter Lam

Reg. 44855

Patent agent

Extreme Networks

San Jose, CA · 95119

408-352-2479

Ricky Q. Lam

Reg. 72045

Patent agent

RL Patents, LLC/Outsource Asia, LLC

San Francisco, CA · 94132

415-730-9244

Samuel T Lam

Reg. 71105

Patent attorney

Electronic Arts Inc.

Redwood City, CA · 94065

650-628-7810

Scott A Lam

Reg. 56108

Patent attorney

Rosemead, CA · 91770

415-300-4323

Shannon H. Lam

Reg. 65614

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Vincent S Lam

Reg. 53177

Patent attorney

DLA Piper LLP (US)

San Diego, CA · 92101-4297

619-699-2867

Wilfred H Lam

Reg. 41923

Patent attorney

Innovation Management Sciences

Los Altos, CA · 94023-1169

650-969-8300

Owen Lester Lamb

Reg. 20831

Patent agent

Soluang, CA · 93464-1655

805-688-4916

Beverly J. Lamberson

Reg. 78007

Patent attorney

Lowenstein Sandler

Palo Alto, CA · 94301

650-433-5610

Jonathan J Lamberson

Reg. 57352

Patent attorney

White & Case LLP

Palo Alto, CA · 94306

650-213-0300

Brian K Lambert

Reg. 60708

Patent attorney

Paradice and Li LLP

Los Gatos, CA · 95032

408-214-9222

Niccola J Lambert

Reg. 41138

Patent agent

Niccola Lambert

San Jose, CA · 95135

408-270-9627

William R Lambert

Reg. 44857

Patent attorney

Sheppard Mullin Richter & Hampton LLP

Menlo Park, CA · 94025

650-815-2644

Michael L Lamberty

Reg. 50760

Patent agent

Atheer.

Mountain View, CA · 94043

256-479-5590

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.