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 Womble Bond Dickinson (US) LLP, Lucem, PC, and Pivot Bio.

Top cities in California

All practitioners in California

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

O'Melveny & Myers LLP

Newport Beach, CA · 92660

949-823-7938

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

Ying Jiang

Reg. 70071

Patent agent

Kenja IP Law PC

Palo Alto, CA · 94303

650-561-4758

Yuan Qing Jiang

Reg. 53074

Patent agent

San Jose, CA · 95128

650-279-6989

Suzanne Jillo

Reg. 44888

Patent attorney

San Jose, CA · 95125

408-448-0576

Bo Jin

Reg. 80983

Patent attorney

Simpson Thacher & Bartlett, LLP

Palo Alto, CA · 94304

650-251-5068

Jian Jin

Reg. 63833

Patent agent

Los Gatos, CA · 95032

408-221-9260

Jigang Jin

Reg. 60592

Patent agent

JIN LAW FIRM

Burlingame, CA · 94011-1455

408-220-4350

Mei Jin

Reg. 77108

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3425

Qingwu Jin

Reg. 67134

Patent agent

San Jose, CA · 95120

408-724-7738

Zheng Jin

Reg. 57611

Patent attorney

Imperium Patent Works

Sunol, CA · 94586

925-862-9972

Jennifer S. Jo

Reg. 81761

Patent attorney

Huntington Beach, CA · 92647

714-224-9140

Sung Hi Jo

Reg. 56734

Patent attorney

Los Angeles, CA · 90057

213-876-4988

Jonathan Edward Jobe· Jr

Reg. 28429

Patent attorney

Duane Morris LLP

San Diego, CA · 92101

619-744-2232

Matthew Francis Jodziewicz

Reg. 30858

Patent attorney

Los Angeles, CA · 90049

310-471-1519

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.