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 Wilson Sonsini Goodrich & Rosati, Fenwick & West LLP, and Qualcomm, Inc..

Top cities in California

All practitioners in California

Qi Zhang

Reg. 74798

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

603-369-8683

Qin Zhang

Reg. 48659

Patent agent

Los Angeles, CA · 90066

310-948-1280

Rongtian Zhang

Reg. 71773

Patent attorney

Qualcomm, Inc.

San Diego, CA · 92121

858-845-7370

Tao Zhang

Reg. 56713

Patent attorney

Huawei

Santa Clara, CA · 95050

408-330-4491

Tony Y. Zhang

Reg. 76152

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

510-815-8481

Xinhui Zhang

Reg. 800111

Limited recognition

Morrison & Foerster

Los Angeles, CA · 90017

213-892-5601

Xinming Zhang

Reg. 81604

Patent agent

Morgan Lewis & Bockius

San Francisco, CA · 94105

415-442-1392

Xuan Zhang

Reg. 66781

Patent agent

IntelllFluence Patent Firm

El Monte, CA · 91731

626-628-7931

Yan Zhang

Reg. 76172

Patent agent

U.S. Fairsky LLP

San Ramon, CA · 94583

510-378-0192

Yi Zhang

Reg. 68745

Patent attorney

Junhe Law Office, P.C.

Cupertino, CA · 95014

650-739-5529

Yi Zhang

Reg. 74150

Patent attorney

Chang & Hale LLP

Irvine, CA · 92612

949-336-1454

Yiming Zhang

Reg. 66354

Patent agent

Dolby Laboratories, Inc.

San Francisco, CA · 94103

415-357-7164

Yixin Zhang

Reg. 63512

Patent attorney

Fenwick & West LLP

Mountain View, CA · 94041

650-335-7866

Yuan Yuan Zhang

Reg. 63787

Patent agent

CHRISTIE, PARKER & HALE, LLP

Glendale, CA · 91203-1445

626-795-9900

Yuanjia Zhang

Reg. 70186

Patent agent

Orrick, Herrington & Sutcliffe, LLP

Irvine, CA · 92614

650-289-7111

Zichao Zhang

Reg. 73948

Patent attorney

Henlius USA Inc.

Milpitas, CA · 95035

510-445-0305

Carmel J. Zhao

Reg. 78556

Patent agent

Fenwick & West LLP

Mountain View, CA · 94041

650-335-7887

Chen Zhao

Reg. 79254

Patent agent

South San Francisco, CA · 94080

650-335-7634

Huilei Zhao

Reg. 81358

Patent agent

DLA Piper US

Palo Alto, CA · 94304

210-882-6257

Tiffany A Zhao

Reg. 81189

Patent agent

Los Angeles, CA · 90007

503-515-3933

Xin Zhao

Reg. 63513

Patent agent

San Diego, CA · 92129

858-538-8682

Yubai Zhao

Reg. L1360

Limited recognition

Law Office of James Zhou

City of Industry, CA · 91748

512-203-2406

Chris J. Zhen

Reg. 68532

Patent attorney

Rovi Corporation

Burbank, CA · 91504

213-935-0715

Chunyu Zheng

Reg. 78841

Patent attorney

Gibson, Dunn & Crutcher LLP

Los Angeles, CA · 90071

213-229-7222

Jamie Jie Zheng

Reg. 51167

Patent attorney

USCH Law, PC

Palo Alto, CA · 94306

650-521-4828

Jie Zheng

Reg. 75191

Patent agent

Palo Alto, CA · 94301

650-352-1962

Jing Zheng

Reg. 75830

Patent attorney

Procopio, Cory, Hargreaves & Savitch LLP

Palo Alto, CA · 94306

650-645-9047

Joe Zheng

Reg. 39450

Patent agent

Silicon Valley Patent Agency, Inc.

Cupertino, CA · 95015

408-777-8873

Limin Zheng

Reg. 76330

Patent attorney

Natera, Inc.

San Carlos, CA · 94070-2396

510-701-3735

Pujie Zheng

Reg. 62786

Patent attorney

Law Offices of Pujie Zheng

El Monte, CA · 91731-2533

626-279-7200

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.