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 Dergosits & Noah LLP, Womble Bond Dickinson LLP, and Fish & Richardson, P.C..

Top cities in California

All practitioners in California

Stephen Hawley Youtsey

Reg. 53821

Patent attorney

Dergosits & Noah LLP

San Francisco, CA · 94111

415-705-6377

Travis R Yribarren

Reg. 58269

Patent attorney

Womble Bond Dickinson LLP

Palo Alto, CA · 94304

408-341-3000

Tanea Ysaguirre

Reg. 72520

Patent attorney

Los Angeles, CA · 90019

310-902-7977

Alex Yu

Reg. 74295

Patent attorney

Fish & Richardson, P.C.

Redwood City, CA · 94063

650-839-5007

Allen K Yu

Reg. 54559

Patent attorney

Allen Yu, Registered Patent Attorney

Sunnyvale, CA · 94087

650-776-4407

Chiahua George Yu

Reg. 43301

Patent attorney

Law Offices of C. George Yu

Sunnyvale, CA · 94086-5404

408-739-4518

David Yu

Reg. 63441

Patent attorney

Ardent Law Group, P.C.

Irvine, CA · 92612

949-863-9782

Dean M. Yu

Reg. 79507

Patent attorney

Herbert Smith Freehills Kramer (US) LLP

Redwood Shores, CA · 94065

650-752-1743

George C Yu

Reg. 44418

Patent attorney

Salesforce.com, Inc.

San Francisco, CA · 94105

415-243-6579

Jacqueline Yu

Reg. 80476

Patent agent

San Diego, CA · 92126

818-378-7626

Jianing G. Yu

Reg. 74296

Patent attorney

Foley & Lardner

Los Angeles, CA · 90071-2411

213-972-4833

Junying Yu

Reg. 54560

Patent agent

Dublin, CA · 94568

408-518-1649

Lin Yu

Reg. 57083

Patent attorney

Jones Day

San Diego, CA · 92121

858-314-1128

Ping Yu

Reg. 59625

Patent agent

San Jose, CA · 95110

408-820-8011

Wenhua Yu

Reg. 67687

Patent attorney

San Diego, CA · 92130

814-880-8831

Wingho Yu

Reg. 62605

Patent agent

Keyssa, Inc.

Campbell, CA · 95008

408-637-2320

Xiang Yu

Reg. 82895

Patent attorney

Los Angeles, CA · 90017

332-248-5945

Howard J. Yuan

Reg. 67985

Patent attorney

Yahoo Inc.

Mountain View, CA · 94040

408-621-5227

Jinrong Yuan

Reg. 76066

Patent agent

Haynes and Boone, LLP

San Francisco, CA · 94104

415-293-8926

Mark D Yuan

Reg. 57312

Patent attorney

NVIDIA Corporation

Santa Clara, CA · 95051

000-000-0000

Wei Yuan

Reg. 71772

Patent agent

Perkins Coie LLP

San Diego, CA · 92130

858-720-5798

Xiaomei Yuan

Reg. 82557

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

305-804-1855

Yunan Yuan

Reg. 73637

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-6857

Helene A Yuen

Reg. 59478

Patent attorney

San Carlos, CA · 94070

650-576-6423

Matthew H. Yuen

Reg. 74457

Patent attorney

Myuen Law

Montery, CA · 93940

831-272-2346

Beyong H Yuu

Reg. 60578

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-651-5308

Emre B. Yuzak

Reg. 78823

Patent attorney

GlobalFoundries U.S. Inc.

Santa Clara, CA · 95054

408-462-3900

Karen Rose Zachow

Reg. 46332

Patent agent

Life Technologies Corporation

Carlsbad, CA · 92008

760-476-7775

Shahrooz Isaac Zaghi

Reg. 55951

Patent attorney

S. Isaac Zaghi

Calabasas, CA · 91302

818-515-0018

Sorin G. Zaharia

Reg. 75662

Patent attorney

O'Melveny & Myers LLP

San Francisco, CA · 94111

415-984-8942

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.