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 Lee, Hong, Degerman, Kang & Waimey PC, Tropical Lab Productions LLC, and Westin Automotive Products, Inc..

Top cities in California

All practitioners in California

Jen-Feng Lee

Reg. 46864

Patent attorney

City Of Industry, CA · 91748

626-810-7200

Jennifer J Lee

Reg. 68245

Patent attorney

Tropical Lab Productions LLC

Santa Clarita, CA · 91380

424-272-7134

Jenny Lee

Reg. 46865

Patent attorney

Westin Automotive Products, Inc.

San Dimas, CA · 91773

949-716-7568

Jieh-Sheng Lee

Reg. 83675

Patent attorney

San Jose, CA · 95126

408-609-3757

John A Lee

Reg. 53194

Patent attorney

McDermott Will & Emery LLP

Palo Alto, CA · 94304-1212

650-813-5098

John H Lee

Reg. 53193

Patent attorney

Lawrence Livermore National Security

Livermore, CA · 94551

925-422-7073

Joseph K. Lee

Reg. 71143

Patent attorney

Irvine, CA · 92603

949-648-9772

Joseph H Lee

Reg. 37664

Patent attorney

Hewlett Packard Enterprise

Palo Alto, CA · 94304

650-236-7163

Joshua M Lee

Reg. 71650

Patent attorney

Ionis Pharmaceuticals, Inc.

Carlsbad, CA · 92010

760-286-8674

Justin D Lee

Reg. 68164

Patent attorney

Lee, Hong, Degerman, Kang & Waimey PC

Los Angeles, CA · 90017

213-623-2221

Kawon Lee

Reg. 68246

Patent attorney

Palo Alto, CA · 94301-1479

650-815-2600

Letitia C Lee

Reg. 73967

Patent agent

Foster City, CA · 94404

650-867-2178

Michael Bing Kong Lee

Reg. 31846

Patent attorney

Beyer Law Group LLP

Palo Alto, CA · 94303

650-842-1300

Michael Chen Lee

Reg. 51930

Patent attorney

Cisco Systems, Inc.

San Jose, CA · 95134-1706

408-424-4180

Michael K Lee

Reg. 77063

Patent agent

San Diego, CA · 92142

Michelle Lee

Reg. 69918

Patent attorney

Five Prime Therapeutics, Inc

South San Francisco, CA · 94080

650-745-9689

Mike H. Lee

Reg. 63941

Patent attorney

Kramer Levin Naftalis & Frankel LLP

Menlo Park, CA · 94025

650-752-1716

Moon Hee Lee

Reg. 79801

Patent attorney

Quinn Emanuel Urquhart & Sullivan, LLP

Los Angeles, CA · 90017

213-443-3000

Myoung K Lee

Reg. 51931

Patent attorney

Anaheim, CA · 92805

714-535-6094

Na Kyung Lee

Reg. 80242

Patent attorney

E Palo Alto, CA · 94303

650-269-0677

Nathan J. Lee

Reg. 75560

Patent attorney

SHEPPARD MULLIN RICHTER & HAMPTON, LLP

Costa Mesa, CA · 92626

714-424-8273

Norman Thomas Lee

Reg. 58941

Patent attorney

Lee, Hong, Degerman, Kang & Waimey PC

Los Angeles, CA · 90017

213-623-2221

Otto O Lee

Reg. 37871

Patent attorney

Intellectual Property Law Group, LLP

San Jose, CA · 95113

408-286-8933

Pak Kei Lee

Reg. 76389

Patent agent

Emeryville, CA · 94662

510-323-0038

Paul J Lee

Reg. 52420

Patent attorney

Dexcom, Inc.

San Diego, CA · 92121

Paul J. Lee

Reg. 69375

Patent attorney

KPPB, LLP

Long Beach, CA · 90806

949-852-0000

Paul N. Lee

Reg. 60855

Patent attorney

Parker FSD

Irvine, CA · 92606

310-111-2222

Philip H Lee

Reg. 50645

Patent attorney

Alfred E. Mann Foundation for Scientific Research

Valencia, CA · 91355

661-702-6882

Phillip P Lee

Reg. 46866

Patent attorney

Qualcomm, Inc.

San Jose, CA · 95134

408-546-2013

Phillip J Lee

Reg. 60923

Patent attorney

Samsung Research America, Inc.

Mountain View, CA · 94043

650-584-2305

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.