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 Morrison & Foerster LLP, Apple Inc., and Latham & Watkins LLP.

Top cities in California

All practitioners in California

Cindy H Chiu

Reg. 52740

Patent agent

Moraga, CA · 94556

925-376-2814

Euborn Y. B. Chiu

Reg. 67443

Patent attorney

Apple Inc.

Cupertino, CA · 95014

925-389-6681

Eugene Chiu

Reg. 63685

Patent attorney

Latham & Watkins LLP

Menlo Park, CA · 94025

650-470-4973

Hsiu Ju Chiu

Reg. 74704

Patent agent

Redwood City, CA · 94061

650-302-5088

Jay Y. Chiu

Reg. 58650

Patent attorney

City of Industry, CA · 91715-3717

Jay C Chiu

Reg. 47308

Patent attorney

K & L Gates LLP

Irvine, CA · 92614

949-623-3522

Karen K. Chiu

Reg. 82415

Patent agent

Womble Bond Dickinson (US) LLP

San Diego, CA · 92121

858-313-1404

Matthew A. Chivvis

Reg. 61256

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105-2482

415-268-7307

Mazen Chmaytelli

Reg. 52741

Patent attorney

Qualcomm, Inc.

San Diego, CA · 92121

858-658-3679

Choong Won Cho

Reg. 79713

Patent attorney

Broadview IP Law, PC

Irvine, CA · 92602

949-232-0721

Dae H Cho

Reg. 67769

Patent attorney

Sheppard Mullin

San Diego, CA · 92130

858-720-7420

Hanbum Cho

Reg. 58993

Patent agent

CIC Consulting

San Jose, CA · 95120

408-910-0988

Kyunghee Cho

Reg. 75933

Patent agent

Glaukos Corporation

Aliso Viejo, CA · 92656

310-487-1292

Samuel Y Cho

Reg. 69013

Patent agent

San Diego, CA · 92130

858-204-5415

Samuel S Cho

Reg. 58782

Patent agent

Invent Capture, LLC

Newark, CA · 94560

408-373-6565

Woo Soon Choe

Reg. 56726

Patent attorney

Torrance, CA · 90503

626-264-3353

Anita S Choi

Reg. 71792

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-6445

Boyeon Choi

Reg. 78529

Patent attorney

Antheros Legal Advisors LLP

San Diego, CA · 92122

617-404-3766

Christopher S Choi

Reg. 78697

Patent agent

Trackonomy Systems, Inc.

San Jose, CA · 95112

833-872-2566

Edward H Choi

Reg. 64759

Patent agent

Santa Clara, CA · 95051

323-886-3339

Erin M. Choi

Reg. 73108

Patent attorney

Carr & Ferrell LLP

Menlo Park, CA · 94025

650-812-3459

Gilbert J Y Choi

Reg. 74780

Patent agent

Morrison & Foerster LLP

San Francisco, CA · 94105

650-575-6145

Heungsoo Choi

Reg. 69282

Patent attorney

Knobbe, Martens, Olson & Bear. LLP

Irvine, CA · 95401

858-707-4000

Hogene L Choi

Reg. 68145

Patent attorney

Morrison & Foerster LLP

Palo Alto, CA · 94304-1018

650-813-5600

Hoon Choi

Reg. 64214

Patent attorney

Jones Day

San Diego, CA · 92130

858-314-1179

Isaac Choi

Reg. 81571

Patent agent

Redwood City, CA · 94065

650-801-5000

Jaeyoung Choi

Reg. 82708

Patent agent

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92603

949-721-2810

Jaime D Choi

Reg. 59198

Patent attorney

Sheppard Mullin Richter & Hampton LLP

San Diego, CA · 92130

858-876-3545

Jay Choi

Reg. 72379

Patent agent

O'Melveny & Myers, LLP

San Francisco, CA · 94111

415-984-8700

Jay Hyunje Choi

Reg. 63519

Patent attorney

San Francisco, CA · 94103

408-721-1658

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.