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 Innovation Counsel LLP, Quinn Emanuel Urquhart & Sullivan, LLP, and Hickman Palermo Truong & Becker, LLP.

Top cities in California

All practitioners in California

Signe M A Holmbeck

Reg. 46484

Patent agent

Innovation Counsel LLP

Santa Clara, CA · 95514-2818

408-331-1674

Andrew M Holmes

Reg. 64718

Patent attorney

Quinn Emanuel Urquhart & Sullivan, LLP

San Francisco, CA · 94111

415-875-6322

Craig G Holmes

Reg. 44770

Patent attorney

Hickman Palermo Truong & Becker, LLP

San Jose, CA · 95110-1089

408-414-1207

Emily Holmes

Reg. 40652

Patent attorney

The Scripps Research Institute

La Jolla, CA · 92037

858-784-2937

Jennifer K Holmes

Reg. 46778

Patent attorney

Encoded Therapeutics

South Francisco, CA · 94080

650-515-7016

Mark Snyder Holmes

Reg. 31970

Patent attorney

Menlo Park, CA · 94026-7710

650-257-4480

Peter Lloyd Holmes

Reg. 37353

Patent attorney

Peter L Holmes, Esq.

Redondo Beach, CA · 90277

310-748-6315

Stephen C. Holmes

Reg. 59259

Patent attorney

Omnus Law

San Jose, CA · 95113

408-715-7980

Tamara L.P. Holst

Reg. 82806

Patent agent

Woodland, CA · 95695

530-379-3605

Blake L Holt

Reg. 78639

Patent attorney

Foley & Lardner, LLP

San Diego, CA · 92130

858-847-6700

Peter T Holt

Reg. 45987

Patent attorney

Holt Law Firm

Roseville, CA · 95630

916-865-4366

David A Holtzman

Reg. 51815

Patent attorney

Holtzman Law

Burbank, CA · 91502

310-210-4856

Judith S. H. Hom

Reg. 44772

Patent attorney

Law Office of Judith S.H. Hom

San Francisco, CA · 94116

415-845-6220

Quon C Hom

Reg. 61928

Patent attorney

San Francisco, CA · 94134

415-505-3231

Raymond B Hom

Reg. 44773

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-651-3679

Richard P. Hom

Reg. 58899

Patent attorney

San Francisco, CA · 94122

415-922-1163

Roy K. Hom

Reg. 71250

Patent agent

Mintz Levin Cohn Ferris Glovsky and Popeo PC

San Francisco, CA · 94104

415-432-6000

Mark W Homer

Reg. 41848

Patent attorney

NASA Mgmt. Office

Pasadena, CA · 91109

818-354-7770

Ramsey P Homsany

Reg. 53033

Patent attorney

Dropbox, Inc.

San Francisco, CA · 94107

415-857-6813

Brian D. Hong

Reg. 78472

Patent attorney

Sierra Madre, CA · 91024

626-758-2719

David Hong

Reg. 45704

Patent attorney

Law Office Of David Hong

Santa Clarita, CA · 91386-2111

866-824-8680

Enshan Hong

Reg. 67777

Patent attorney

VLP Law Group LLP

Palo Alto, CA · 94301

212-203-0976

Ghy Boong Hong

Reg. 66057

Patent agent

Patent4USA

San Diego, CA · 92130

858-703-7368

Jong P Hong

Reg. 51290

Patent attorney

Dechert LLP

Mountain View, CA · 94040-1499

650-813-4800

Juan Hong

Reg. 56806

Patent attorney

Irvine, CA · 92617-4026

949-278-6618

Julie J Hong

Reg. 56961

Patent agent

Amgen Inc.

Thousand Oaks, CA · 91320

650-636-6365

Kathryn N. S. Hong

Reg. 63693

Patent attorney

Burlingame, CA · 94010

650-543-4800

Lauren J. Hong

Reg. 83316

Patent agent

McDermott Will & Schulte

San Francisco, CA · 94105

443-745-4627

Mei Hong

Reg. 55276

Patent agent

DuPont IndustrialBiosciences

Palo Alto, CA · 94304

650-846-7500

Suk-Hyun S Hong

Reg. 83999

Patent agent

San Diego, CA · 92130

858-793-9815

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.