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 Coughlin Stoia Geller Rudman & Robbins LLP, DLA Piper US LLP, and Desmarais LLP.

Top cities in California

All practitioners in California

Fumitomo Hide

Reg. 75759

Patent agent

El Cerrito, CA · 94530-2584

408-202-8441

Jesse J Hierholzer

Reg. 59969

Patent attorney

Coughlin Stoia Geller Rudman & Robbins LLP

San Diego, CA · 92101

619-231-1058

Matthew J Hierholzer

Reg. 53021

Patent attorney

DLA Piper US LLP

San Diego, CA · 9212-2133

858-638-6638

Mehdi Hifai Nasserian

Reg. 48852

Patent agent

Torrance, CA · 90503

818-231-0583

Gabrielle E Higgins

Reg. 38916

Patent attorney

Desmarais LLP

San Francisco, CA · 94111-5817

415-573-1902

James Asa High

Reg. 55266

Patent attorney

Amgen Inc.

South San Francisco, CA · 94080

650-244-8547

Robert Frederick Hightower

Reg. 36163

Patent attorney

Hightower and Associates

Dana Point, CA · 92629

480-816-9607

William J Higley

Reg. 67503

Patent agent

LOWENSTEIN SANDLERS LLP

Palo Alto, CA · 94301

650-433-5800

Kristin C Hiibner

Reg. 50139

Patent attorney

Karish & Bjorgum PC

Pasadena, CA · 91101

213-785-8070

Andrew M Hilger

Reg. 73366

Patent agent

Fenwick & West, LLP

Mountain View, CA · 94041

650-335-7953

D David Hill

Reg. 35543

Patent attorney

Fallbrook, CA · 92028

460-451-8671

David Anthony Hill

Reg. 44153

Patent attorney

Haverstock and Owens, LLP

Sunnyvale, CA · 94086

408-530-9700

Erin K Hill

Reg. 80648

Patent agent

Arcus Biosciences, Inc.

Hayward, CA · 94545

510-509-1890

James William Hill

Reg. 46396

Patent attorney

Perkins Coie LLP

Los Angeles, CA · 90067-1721

310-788-9900

Laurie L Hill

Reg. 51804

Patent attorney

Altos Labs, Inc.

Redwood City, CA · 94065

858-663-4532

Robert Charles Hill

Reg. 20903

Patent attorney

San Francisco, CA · 94104

415-421-2080

Travis J. Hill

Reg. 70199

Patent attorney

Paradice and Li LLP

Campbell, CA · 95011

669-392-3974

Matthew K Hillman

Reg. 45892

Patent agent

Carlsbad, CA · 92009

760-815-6946

Robert J. Hilton

Reg. 70224

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

858-707-4000

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

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.