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 Law Office of David S.T. Jenkins, Mintz, Levin, Cohn, Ferris, Glovksy and Papeo, P.C., and Knobbe Marten Olson and Bear, LLP.

Top cities in California

All practitioners in California

Kenyon S Jenckes

Reg. 41873

Patent agent

San Diego, CA · 92101

619-535-0083

David Stuart Taylor Jenkins

Reg. 35206

Patent attorney

Law Office of David S.T. Jenkins

Sunnyvale, CA · 94086

408-241-5436

Kenneth E Jenkins

Reg. 51846

Patent attorney

Mintz, Levin, Cohn, Ferris, Glovksy and Papeo, P.C.

San Diego, CA · 92130

858-314-1082

Randi L Jenkins

Reg. 50297

Patent agent

Sacramento, CA · 95835

Joseph F Jennings

Reg. 40664

Patent attorney

Knobbe Marten Olson and Bear, LLP

Irvine, CA · 92614

949-760-0404

Romeao J Jennings· III

Reg. 65808

Patent agent

Akin Gump Strauss Hauer & Feld LLP

Irvine, CA · 92614

949-885-4100

Kenneth Jenq

Reg. 75336

Patent attorney

San Francisco, CA · 94127

310-422-8679

Jonathan J Jensen

Reg. 59433

Patent agent

Salk Institute for Biological Studies

La Jolla, CA · 92037

617-818-0716

Philip D Jensen

Reg. 63563

Patent agent

Polsinelli

San Francisco, CA · 94111

415-248-2114

Ryan Karl Jensen

Reg. 903116

Limited recognition

California Western School of Law

San Diego, CA · 92101-3046

510-326-4556

Stephen Chris Jensen

Reg. 35556

Patent attorney

Knobbe Martens Olson and Bear, LLP

Irvine, CA · 92614

949-760-0404

Travis M. Jensen

Reg. 60087

Patent attorney

Orrick, Herrington & Sutcliffle LLP

Menlo Park, CA · 94025-1015

650-614-7458

Peter C. Jensen-Haxel

Reg. 71039

Patent attorney

Menlo Park, CA · 94025

541-301-4960

Jun-Young Edwin Jeon

Reg. 43693

Patent attorney

Womble Bond Dickinson (US) LLP

Glendale, CA · 91203-1445

626-795-9900

Lauren E Jeong

Reg. 78163

Patent agent

Lucem, PC

Los Angeles, CA · 90017

213-387-3630

Susan Jeong

Reg. 67934

Patent agent

San Diego, CA · 92123

858-560-9087

Suzanne G Jepson

Reg. 51848

Patent agent

Pivot Bio

Berkeley, CA · 94710

619-886-3166

Martin Jerisat

Reg. 44811

Patent attorney

Jerisat Law Firm

Irvine, CA · 92614

714-571-5700

Charles Hung Jew

Reg. 34192

Patent attorney

San Francisco, CA · 94127

415-250-1378

Leon Emmanuel Jew

Reg. 46804

Patent attorney

Dahyee Law Group

Pleasanton, CA · 94588

925-463-3288

Patrick R Jewik

Reg. 40456

Patent attorney

KILPATRICK TOWNSEND & STOCKTON, LLP

San Francisco, CA · 94111

415-576-0200

Mukta Jhalani

Reg. 69746

Patent attorney

Finnegan Henderson

Palo Alto, CA · 94304

650-849-6759

Eunjeong Ji

Reg. 83868

Patent attorney

KOIPA LA IP CENTER

Los Angeles, CA · 90010

213-573-4157

Chen Jia

Reg. 69479

Patent attorney

Irvine, CA · 92602

202-286-2089

Hongyan Jian

Reg. 61348

Patent agent

San Francisco, CA · 94116

415-200-8145

Nan Jiang

Reg. 73350

Patent attorney

eBay, Inc.

San Jose, CA · 95125

248-819-2610

Runkun Jiang

Reg. 78118

Patent attorney

Perkins Coie LLP

San Diego, CA · 92130

858-720-5700

Sai On Clement Jiang

Reg. 65319

Patent attorney

Fullerton, CA · 92833

714-656-4138

Shazi Jiang

Reg. 66578

Patent attorney

McNeill PLLC

San Diego, CA · 92108

520-492-8010

Yanning Jiang

Reg. 83495

Patent agent

Calabasas, CA · 91302

626-684-7695

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.