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 Blakely Sokoloff Taylor & Zafman, Northrop Grumman Corporation, and Koppel, Patrick, Heybl & Dawson.

Top cities in California

All practitioners in California

Stephen N Hew

Reg. 66544

Patent attorney

Blakely Sokoloff Taylor & Zafman

Sunnyvale, CA · 94084-4040

408-720-8300

Scot Regan Hewitt

Reg. 35191

Patent attorney

Northrop Grumman Corporation

Redondo Beach, CA · 90277

310-813-1550

Jaye Gerard Heybl

Reg. 42661

Patent attorney

Koppel, Patrick, Heybl & Dawson

Westlake Village, CA · 91361

805-373-0060

Monique M Heyninck

Reg. 44763

Patent attorney

Tustin, CA · 92780

714-812-4057

Denise M Hickey

Reg. 39708

Patent attorney

Celgene

San Diego, CA · 92121

858-558-7500

Brian Don Hickman

Reg. 35894

Patent attorney

Hickman Palermo Becker Bingham, LLP

San Jose, CA · 95113

408-414-7490

Paul Lawrence Hickman

Reg. 28516

Patent attorney

TIPS Group

Palo Alto, CA · 94303

650-293-3355

Eric S Hickok

Reg. 54168

Patent agent

San Jose, CA · 95125

408-408-4917

Jarrod L Hicks

Reg. 61467

Patent attorney

Invoke IP

Danville, CA · 94526

408-634-4257

Jonathan H. Hicks

Reg. 75195

Patent attorney

Kasowitz Benson Torres LLP

Redwood City, CA · 94065

650-453-5423

Kenjiro Hidaka

Reg. 31077

Patent agent

Los Angeles, CA · 90025

310-474-2668

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

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.