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 Google LLC, Dechert LLP, and Kaufman Dolowich LLP.

Top cities in California

All practitioners in California

Charles Hsu

Reg. 78024

Patent attorney

Dechert LLP

Palo Alto, CA · 94306

650-813-4808

Christy L. Hsu

Reg. 82080

Patent attorney

Newport Beach, CA · 92660

949-219-3615

Edward C. Hsu

Reg. 59739

Patent attorney

Kaufman Dolowich LLP

Los Angeles, CA · 90025

310-775-6511

Eric Y. Hsu

Reg. 67741

Patent attorney

Cupertino, CA · 95014

408-930-0514

Frederick Hsu

Reg. 65375

Patent attorney

Xilinx Inc.

San Jose, CA · 95124

510-673-5538

Jennifer L Hsu

Reg. 71473

Patent agent

Genentech, Inc.

South San Francisco, CA · 94080

626-283-2871

Johannes S Hsu

Reg. 74689

Patent attorney

Orrick, Herrington & Sutcliffe

Irvine, CA · 92614-8255

949-852-7776

Kendrick S Hsu

Reg. 72043

Patent attorney

Irvine, CA · 92606

818-903-6325

Lin Chia Lin Hsu

Reg. 46315

Patent attorney

Murabito Hao & Barnes LLP

San Jose, CA · 95113

408-938-9060

Margaret H Hsu

Reg. 69593

Patent agent

Redding, CA · 96003

650-995-6571

Michael K Hsu

Reg. 46782

Patent attorney

Intuit Inc.

Mountain View, CA · 94043

800-446-8848

Ming-Yuh Hsu

Reg. 67936

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-783-2678

Nigel J. Hsu

Reg. 68333

Patent agent

Google, Inc.

Mountain View, CA · 94043

650-253-1337

Richard C Hsu

Reg. 41853

Patent attorney

Shearman & Sterling LLP

Palo Alto, CA · 94306

650-838-3774

Susan Hsu

Reg. 75413

Patent agent

Albany, CA · 94706

714-422-5155

Teddie C Hsu

Reg. 67780

Patent attorney

Snell & Wilmer L.L.P.

Los Angeles, CA · 90071

213-929-2542

Vyson Hsu

Reg. 84064

Patent attorney

Thompson Hine LLP

San Mateo, CA · 94402

650-521-5930

Wenchi Hsu

Reg. 74994

Patent agent

Cupertino, CA · 95014

408-981-9691

Wendy Lei Hsu

Reg. 42794

Patent attorney

Pfizer, Inc

San Diego, CA · 92130

858-526-4652

Ahren C Hsu-Hoffman

Reg. 50862

Patent attorney

Morgan, Lewis & Bockius LLP

Palo Alto, CA · 94304

650-843-4000

James S Hsue

Reg. 29545

Patent attorney

San Francisco, CA · 94116

415-276-6500

Victor Y. Hsue

Reg. 81811

Patent attorney

Google LLC

Mountain View, CA · 94043

650-253-0000

Hain-Whei Hsueh

Reg. 68021

Patent agent

Kilpatrick Townsend & Stockton LLP

San Francisco, CA · 94111

415-273-7548

Peter C Hsueh

Reg. 45574

Patent attorney

Lewis Roca Rothgerber Christie LLP

Glendale, CA · 91203-1445

626-795-9900

Ashley M. Hu

Reg. 62874

Patent attorney

Google LLC

Mountain View, CA · 94043

714-261-0205

Fred H. Hu

Reg. 80386

Patent agent

Veeva Systems Inc.

Pleasanton, CA · 94588

925-452-6500

Irene Y Hu

Reg. 34625

Patent attorney

Law Office of Irene Hu

Sunnyvale, CA · 94087

408-542-9877

Keren Hu

Reg. 60636

Patent attorney

Javalon Law, PC.

Menlo Park, CA · 94025

650-608-5726

Lily W Hu

Reg. 65487

Patent agent

Palo Alto, CA · 94306

650-799-9788

Shoefong C Hu

Reg. 50228

Patent agent

San Jose, CA · 95120

408-997-1986

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.