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 Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C., Patent and Innovations Strategies Group, and Mauriel Kapouytian Woods LLP.

Top cities in California

All practitioners in California

Doris Lee

Reg. 77321

Patent agent

Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.

San Diego, CA · 92130

858-314-1545

Edmund Ming-yin Lee

Reg. 62577

Patent attorney

Vallejo, CA · 94591

707-643-3858

Edward Lee

Reg. 72785

Patent attorney

San Jose, CA · 95134

Elaine Kim Lee

Reg. 57613

Patent attorney

Patent and Innovations Strategies Group

Palo Alto, CA · 94304-1050

650-845-5064

Elaine K Lee

Reg. 41936

Patent attorney

Mauriel Kapouytian Woods LLP

San Francisco, CA · 94111

415-738-6391

Elbert L. Lee

Reg. 71495

Patent agent

San Jose, CA · 95118

408-500-8588

Eric J. Lee

Reg. 76828

Patent attorney

Gilead Sciences, Inc.

Foster City, CA · 94404

650-425-2744

Eric G. Lee

Reg. 59746

Patent attorney

Roche Molecular Systems, Inc.

Pleasanton, CA · 94588

925-251-6729

Erik S. Lee

Reg. 76693

Patent agent

Arcadia, CA · 91007

626-679-5555

Ethan Y Lee

Reg. 68561

Patent attorney

Fenwick & West LLP

Mountain View, CA · 94041

650-335-7241

Eunice Yoojin Lee

Reg. 74217

Patent agent

Amgen

Thousand Oaks, CA · 91320

516-729-6604

Gloria S Lee

Reg. 74997

Patent agent

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-238-7291

Griffin S. Lee

Reg. 67481

Patent attorney

The Law Office of Griffin Lee, APC

La Crescenta, CA · 91214

424-353-2226

Hakno Lee

Reg. 76278

Patent agent

Yorba Linda, CA · 92886

657-242-6824

Hannah Y Lee

Reg. 64001

Patent attorney

Kramer Levin Naftalis & Frankel LLP

Menlo Park, CA · 94025

650-752-1714

Harry Sung Lee

Reg. 56814

Patent agent

Nixon Peabody LLP

Los Angeles, CA · 90071-3151

213-629-6129

Heather A Lee

Reg. 54673

Patent attorney

Sherman Oaks, CA · 91403

310-906-6880

Hoshin Lee

Reg. 64168

Patent attorney

Los Altos, CA · 94024

650-968-1595

Hwa C. Lee

Reg. 59747

Patent attorney

AppDynamics, Inc.

San Francisco, CA · 94107

415-580-4118

Hye In Lee

Reg. 80322

Patent agent

Samsung Research America

Mountain View, CA · 94043

650-210-1001

Hyeok Jae Lee

Reg. 800135

Limited recognition

Polsinelli LLP

San Francisco, CA · 94111

415-248-2174

Hyok Lee

Reg. 84770

Patent agent

Riverside, CA · 92503

951-283-9154

Hyoung Gook Lee

Reg. 79379

Patent agent

K&L Gates LLP

Irvine, CA · 92614

949-623-3617

Irene Y Lee

Reg. 54259

Patent attorney

Russ August & Kabat

Los Angeles, CA · 90025

310-979-8224

Jae Jin Lee

Reg. 800099

Limited recognition

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-721-5281

JaeWon Lee

Reg. 80689

Patent attorney

Lam Research Corporation

Fremont, CA · 94538-6401

213-793-3325

James J Lee

Reg. 75465

Patent attorney

Los Angeles, CA · 90010

310-210-3258

Jason J. Lee

Reg. 62424

Patent attorney

Google LLC

Mountain View, CA · 94043

213-814-4713

Jeehaeng Lee

Reg. 84322

Patent agent

San Jose, CA · 95124

408-409-5383

Jefferson K. Lee

Reg. 83532

Patent agent

Irvine, CA · 92618

949-272-6407

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.