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 Wilson Sonsini Goodrich & Rosati, Stetina Brunda Garred & Brucker, and Hamrick IP Law Office.

Top cities in California

All practitioners in California

Stephen M Hamon

Reg. 67228

Patent attorney

Stetina Brunda Garred & Brucker

Aliso Viejo, CA · 92656

949-855-1246

Claude A S Hamrick

Reg. 22586

Patent attorney

Hamrick IP Law Office

Lincoln, CA · 95648

916-587-1780

Michelle A Hamson

Reg. 81396

Patent attorney

Dinsmore & Shohl

San Diego, CA · 92101

619-400-0483

Ada P Han

Reg. 55243

Patent agent

Sunnyvale, CA · 94087

408-314-8916

Daniel C Han

Reg. 66138

Patent attorney

Santa Clara, CA · 95054

408-512-1907

EunHee Han

Reg. 74578

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

323-210-2908

Franklin Y Han

Reg. 41055

Patent attorney

Patent Law Works LLP

San Jose, CA · 95131

650-537-4500

Hyun Kyu C. Han

Reg. 71958

Patent attorney

Morrison & Foerster LLP

Palo Alto, CA · 94304-1018

650-813-4043

John C Han

Reg. 41403

Patent attorney

Qualcomm Inc

San Diego, CA · 92121

858-845-7255

Johney U Han

Reg. 45565

Patent attorney

Levine Bagade Han LLP

Palo Alto, CA · 94303

650-242-4217

William Teh-Wei Han

Reg. 34344

Patent attorney

MyoKardia, Inc.

Brisbane, CA · 94005

610-270-5263

Yue Han

Reg. 80950

Patent attorney

Armond Wilson LLP

Newport Beach, CA · 92660

949-386-7263

Joseph S Hanasz

Reg. 54720

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-658-5683

Aaron R Hand

Reg. 80694

Patent attorney

Bunsow De Mory LLP

Redwood City, CA · 94063

650-351-7244

Saundra Hand

Reg. 31262

Patent attorney

Law Office of Saundra Hand

Los Gatos, CA · 95031

408-455-7308

Elizabeth A. Handelin

Reg. 73516

Patent agent

LaFollette Johnson Del-Laas Fester Ames

Sacramento, CA · 95825

916-563-3100

Christopher P Handy

Reg. 51772

Patent agent

San Francisco, CA · 94127

415-847-0725

Jennifer K Hane

Reg. 52989

Patent agent

Mountain View, CA · 94043

650-962-9766

Jonathan Hangartner

Reg. 55244

Patent attorney

X-Patents, APC

La Jolla, CA · 92037

858-454-4313

Jeremy F Hanika

Reg. 72442

Patent attorney

San Francisco, CA · 94117

415-430-7913

Jonathan David Hanish

Reg. 57821

Patent attorney

Schwegman, Lundberg & Woessner, P.A.

San Jose, CA · 95113

408-278-4047

Marc S Hanish

Reg. 42626

Patent attorney

Schwegman Lundberg & Woessner

San Jose, CA · 95113

612-373-6900

Gunther Othmar Hanke

Reg. 32989

Patent attorney

Huntington Beach, CA · 92648

714-969-9014

Marc E Hankin

Reg. 38908

Patent attorney

Hankin Patent Law, APC

Los Angeles, CA · 90049

310-979-3600

John Andrew Hankins

Reg. 32029

Patent attorney

McDermott, Will & Emery

Irvine, CA · 92614

949-757-7117

John Vincent Hanley

Reg. 38171

Patent attorney

Explora Med

Mountain View, CA · 94040

650-472-0300

David M. Hanna

Reg. 65373

Patent attorney

Proskauer Rose LLP

Los Angeles, CA · 90067

310-284-4513

Steven G. Hanna

Reg. 80453

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2300

James R Hannah

Reg. 56369

Patent attorney

Herbert Smith Freehills Kramer (US) LLP

Redwood Shores, CA · 94065

650-752-1712

Gabriel Norden Hanover· II

Reg. 33708

Patent attorney

Altadena, CA · 91001

310-534-0959

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.