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 Qualcomm Incorporated, Apple Inc., and Kilpatrick Townsend Stockton LLP.

Top cities in California

All practitioners in California

Chad Y Himeda

Reg. 65486

Patent attorney

Apple Inc.

Cupertino, CA · 95014

650-813-5727

Matthew W. Hindman

Reg. 57396

Patent attorney

Kilpatrick Townsend Stockton LLP

San Francisco, CA · 94111

415-576-0200

Mitchell F. Hinrichs

Reg. 79517

Patent agent

Stryker

San Jose, CA · 95138

408-754-2000

Matthew E Hinsch

Reg. 47651

Patent attorney

KILPATRICK TOWNSEND & STOCKTON, LLP

San Francisco, CA · 94111

415-576-0200

Lacie C Hirayama

Reg. 63866

Patent agent

Sheppard, Mullin, Richter & Hampton LLP

Palo Alto, CA · 94301

650-815-2628

Nicholas A. N. Hirlinger Saylor

Reg. 70233

Patent agent

Arete Associates

Northridge, CA · 91324

818-885-2402

Joseph Ira Hirsch

Reg. 22783

Patent attorney

Palo Alto, CA · 94306-3813

650-493-9169

Lorraine Susan Hirsch

Reg. 35545

Patent attorney

Law Offices Of Lorraine Hirsch

Los Gatos, CA · 95032

408-464-9176

Timothy R. Hirzel

Reg. 61141

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-845-0020

Joan K Hishida

Reg. 46773

Patent agent

Pleasant Hill, CA · 94523

925-934-0796

James Eppa Hite· III

Reg. 30266

Patent attorney

Santa Cruz, CA · 95065

650-856-8848

Benjamin K Hitt

Reg. 69091

Patent agent

Twelve Benefit Corporation

Berkeley, CA · 94710

515-460-8887

Suzan J Hixon

Reg. 54171

Patent attorney

San Francisco, CA · 94100

502-345-7894

Benjamin Ho

Reg. 83979

Patent attorney

San Jose, CA · 95129

408-802-7811

Brian B. Ho

Reg. 60199

Patent attorney

Dentons US LLP

San Francisco, CA · 94105-1101

Duarte Y. Ho

Reg. 75760

Patent agent

Venable LLP

Los Angeles, CA · 90067

310-229-0458

Eric Ho

Reg. 39711

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-658-2752

Kenie Ho

Reg. 51808

Patent attorney

San Francisco, CA · 94107

202-903-3545

Michael T Ho

Reg. 59305

Patent agent

Weaver Austin Villeneuve & Sampson LLP

Oakland, CA · 94612-0250

510-663-1100

Patrick H Ho

Reg. 58185

Patent agent

La Jolla Institute for Allergy & Immunology

La Jolla, CA · 92037

858-752-6500

Pui Tong Ho

Reg. 44155

Patent attorney

Ladera Ranch, CA · 92694-1331

310-435-1734

Rebecca M. Ho

Reg. 76590

Patent attorney

Santa Clarita, CA · 91351

661-348-3004

Yvonne T Ho

Reg. 62524

Patent attorney

San Jose, CA · 95150

Phuong Quan Hoang

Reg. 41839

Patent attorney

Spatial Digital Systems, Inc

Agoura Hills, CA · 91301

949-584-3265

Benjamin B. Hoar

Reg. 82026

Patent agent

Wilson Sonsini Goodrich & Rosati

Los Angeles, CA · 90067

424-599-5745

Tobin L Hobbs

Reg. 63260

Patent agent

Hobbs Trucking Company

Anaheim, CA · 92801

714-776-2520

Mercedes L Hobson

Reg. 72718

Patent attorney

Google LLC (X, the Moonshot Factory)

Mountain View, CA · 94043

310-254-0046

James Mark Hoch

Reg. 35195

Patent attorney

Zogenix, Inc.

Emeryville, CA · 94608

415-269-7694

Lauren Elizabeth Hockett

Reg. 72865

Patent attorney

Knobbe Martens

San Diego, CA · 92130

858-707-4000

Alan Scott Hodes

Reg. 38185

Patent attorney

Menlo Park, CA · 94026

650-839-4786

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.