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 Musarubra US LLC, Higgs Fletcher & Mack, LLP, and Wilson Sonsinii Goodrich & Rosati.

Top cities in California

All practitioners in California

Jonathan D Wong

Reg. 72323

Patent attorney

Musarubra US LLC

San Jose, CA · 95134

408-219-1240

Justine Karoline Wong

Reg. 70380

Patent attorney

Higgs Fletcher & Mack, LLP

San Diego, CA · 92101

619-236-1551

Karen K Wong

Reg. 44409

Patent attorney

Wilson Sonsinii Goodrich & Rosati

Palo Alto, CA · 94304-1050

650-493-9300

Kirk D Wong

Reg. 43284

Patent attorney

Wong & Rees LLP

San Jose, CA · 95129

650-670-8808

Mei Lin Wong

Reg. 66408

Patent agent

Walnut, CA · 91789

626-478-8116

Michelle C Wong

Reg. 50456

Patent attorney

Lawrence Berkeley Natl Laboratory

Berkeley, CA · 94720

510-486-7058

Pamela J Wong

Reg. 54765

Patent attorney

Quest Diagnostics Incorporated

San Juan Capistrano, CA · 92675

949-940-7284

Paul C. Wong

Reg. 70889

Patent attorney

Saratoga, CA · 95070

408-621-9373

Reynold J Wong

Reg. 20892

Patent agent

Reynold Wong, Patent Agent

Mountain View, CA · 94041

650-996-4688

Sharon Wong

Reg. 37760

Patent attorney

Intel Corporation

Irvine, CA · 92612

310-502-5277

Steve A Wong

Reg. 37968

Patent attorney

Amin, Turocy & Watson, LLP

San Clemente, CA · 92673

216-696-8730

Terrence L Wong

Reg. 55741

Patent agent

Van Pelt, Yi & James LLP

Cupertino, CA · 95014

408-973-2578

Tiara T. Wong

Reg. 79470

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

562-714-8646

Wean Khing Wong

Reg. 33561

Patent attorney

South Pasadena, CA · 91030

323-257-8822

William Wong

Reg. 64961

Patent attorney

Irvine, CA · 92620

949-878-2481

Willy H. Wong

Reg. 59191

Patent attorney

Minder Group

San Jose, CA · 95126

626-600-6123

Zi Y Wong

Reg. 58410

Patent attorney

Via LLP

Danville, CA · 94506

949-503-0449

Euclid B Woo

Reg. 45838

Patent attorney

Seal Beach, CA · 90740

562-797-9010

LeAnn K. Woo

Reg. 82570

Patent agent

Los Angeles, CA · 90049

408-876-8340

Noble C Woo

Reg. 77596

Patent agent

Irvine, CA · 92612

617-510-8677

Perry Y Woo

Reg. 52373

Patent attorney

Indio, CA · 92201

516-606-9772

Philip W Woo

Reg. 39880

Patent attorney

Duane Morris LLP

Palo Alto, CA · 94304-1194

650-847-4145

Gregory B Wood

Reg. 28133

Patent attorney

Gregory B. Wood

Northridge, CA · 91324

818-527-1176

William J Wood

Reg. 42236

Patent attorney

Gates & Cooper, LLP

Los Angeles, CA · 90045

310-642-4144

Zachary J. Wood

Reg. 68096

Patent agent

Los Angeles, CA · 90049

310-463-5477

Joshua R. Woods

Reg. 80004

Patent attorney

Irell & Manella, LLP

Newport Beach, CA · 92660

949-760-5145

Michael E Woods

Reg. 33466

Patent attorney

Patent Law Offices of Michael E. Woods

Brisbane, CA · 94005-1637

415-466-6360

Henry Kissinger Woodward

Reg. 22672

Patent attorney

Mountain View, CA · 94040

650-969-1857

Vance A Woodward

Reg. 66943

Patent attorney

N/A

Glendale, CA · 91206

310-753-0803

Evan W. Woolley

Reg. 79810

Patent attorney

Acacia Research Group LLC

Irvine, CA · 92614

949-480-8359

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.