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 Self, Cisco Systems, Inc., and Vista IP Law Group LLP.

Top cities in California

All practitioners in California

Eric S Lucas

Reg. 34215

Patent attorney

Self

Laguna beach, CA · 92651

949-939-3216

Jan G. Lucas

Reg. 75531

Patent attorney

Cisco Systems, Inc.

San Francisco, CA · 94158

628-263-9300

Michael A Lucero

Reg. 80683

Patent agent

Walnut, CA · 91789

909-706-5168

Michael Lester Ludwig

Reg. 53244

Patent agent

Los Angeles, CA · 90064

310-312-5551

Wen-Jeng Lue

Reg. 56564

Patent agent

Sunnyvale, CA · 94087

408-720-1624

Gary D Lueck

Reg. 50791

Patent attorney

Vista IP Law Group LLP

Irvine, CA · 92618

310-613-7739

Dustin M Luettgen

Reg. 77922

Patent attorney

SonoThera, Inc.

South San Francisco, CA · 94080

505-979-8787

Douglas B Luftman

Reg. 43762

Patent attorney

DocuSign, Inc.

San Francisco, CA · 94105

408-205-3500

Jennifer Luh

Reg. 70917

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-7000

Peggy H Luh

Reg. 47761

Patent attorney

Fullerton, CA · 92834

714-871-9586

Karen J Lujan

Reg. 55410

Patent agent

Monrovia, CA · 91016

626-716-1709

Rimas T Lukas

Reg. 46451

Patent attorney

Carlsbad, CA · 92008

760-787-6377

Todd M. Lukes

Reg. 73873

Patent agent

Mendocino, CA · 95460

831-588-5643

Jerry Norair Lulejian

Reg. 30473

Patent attorney

Jerry N. Lulejian, Attorney at Law

Pismo Beach, CA · 93449

805-709-2631

Albert J Lum

Reg. 41957

Patent attorney

Law Office of A. Justin Lum

Pasadena, CA · 91106

626-795-8886

Julie Y. Lum

Reg. 80323

Patent agent

DLA Piper

San Francisco, CA · 94105

650-833-2061

Nathanael R Luman

Reg. 63160

Patent attorney

Knobbe Martens Olson & Bear, LLP

San Diego, CA · 92130

858-836-9000

Shane T. Lunceford

Reg. 64452

Patent attorney

LendingClub

San Francisco, CA · 94105

415-271-9242

Skyler R. Lund

Reg. 72976

Patent agent

Rivian

Irvine, CA · 92612

714-794-8174

Gregory J Lundell

Reg. 54582

Patent agent

Haley Guiliano LLP

San Jose, CA · 95113

669-213-1065

David K Lundgren

Reg. 76636

Patent agent

Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.

San Diego, CA · 92130

858-314-1500

David C Lundmark

Reg. 42815

Patent attorney

Vista IP Law Group, LLP

Saratoga, CA · 95070

408-777-2906

Sean A. Luner

Reg. 36588

Patent agent

Dovel & Luner, LLP

Santa Monica, CA · 90401

310-656-7066

Jessica L. Lunney

Reg. 62125

Patent attorney

Associate Patent Counsel

Mountain View, CA · 94043

650-458-7644

Cong Luo

Reg. 68120

Patent agent

GRAIL

Menlo Park, CA · 94025

650-542-0372

Diana X Luo

Reg. 56818

Patent attorney

WALMART GLOBAL ECOMMERCE

San Bruno, CA · 94066

Lihong Luo

Reg. 63068

Patent agent

Fremont, CA · 94539

203-980-3176

Yabing Luo

Reg. 73439

Patent agent

Foley & Larner LLP

Redwood City, CA · 94301

650-251-1122

Mark Lupkowski

Reg. 49010

Patent attorney

Squire, Sanders & Dempsey (US) LLP

San Francisco, CA · 94111-3356

415-954-0297

Laurent P. Lusinchi

Reg. 75059

Patent agent

Ladas & Parry LLP

Los Angeles, CA · 90036

323-988-4455

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.