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 Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, Sheppard Mullin Richter & Hampton LLP, and Norton Rose Fulbright.

Top cities in California

All practitioners in California

Hanhwe Kim

Reg. 73476

Patent attorney

San Francisco, CA · 94158

650-793-5048

Hanna Kim

Reg. 78784

Patent attorney

Norton Rose Fulbright

San Francisco, CA · 94111

628-231-6800

Hee Jin Kim

Reg. 74165

Patent agent

Fullerton, CA · 92833-5039

714-441-9685

Hyearyun Kim

Reg. 62527

Patent attorney

Dublin, CA · 94568

650-773-8831

Hyeon S. Kim

Reg. 78663

Patent agent

Dinsmore & Shohl LLP

San Diego, CA · 92101-8482

619-400-0494

Hyunjeong Kim

Reg. 81784

Patent agent

Law Offices of K. Freeman Lee & Associates

Los Angeles, CA · 90010

424-371-3448

In Soon Kim

Reg. 51879

Patent attorney

La County King

Los Angeles, CA · 90059

310-668-3973

James S. Kim

Reg. 58211

Patent attorney

Foster City, CA · 94404

415-305-2113

Jangwoo Kim

Reg. 81237

Patent agent

Cupertino, CA · 95014

512-420-3450

Jean M. Kim

Reg. 66762

Patent attorney

Los Angeles, CA · 90071

323-954-9400

Jin I Kim

Reg. 65921

Patent agent

Los Angeles, CA · 90057

213-248-1021

Jinsoo Kim

Reg. 67342

Patent agent

San Jose, CA · 95129

408-262-3312

Jinwoo Kim

Reg. 70914

Patent attorney

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Palo Alto, CA · 94304

650-849-6600

John J Kim

Reg. 68772

Patent attorney

Camarillo, CA · 93012

213-471-2900

Johnny J Kim

Reg. 45616

Patent attorney

Quinn Emanuel

Redwood Shores, CA · 94065

650-801-5000

Joseph JoonHo Kim

Reg. 67447

Patent attorney

Santa Clara, CA · 95054

408-657-3573

Joseph Hyosuk Kim

Reg. 41425

Patent agent

JHK Law

La Canada, CA · 91012-1078

818--24-9-8177

Joshua E. Kim

Reg. 67019

Patent attorney

Quest Diagnostics

San Juan Capistrano, CA · 92675

949-940-7287

Jung Whan Kim

Reg. 60853

Patent attorney

BakerHostetler

Costa Mesa, CA · 92626

714-966-3519

Jungyeon Kim

Reg. 82377

Patent attorney

Wilmer Cutler Pickering Hale & Dorr LLP

Palo Alto, CA · 94306-1717

650-600-5081

Justin S. S. Kim

Reg. 70669

Patent attorney

Welebir Tierney & Weck

Redlands, CA · 92374

909-335-0444

Keith Y Kim

Reg. 65440

Patent agent

Torrance, CA · 90501

949-294-3663

Kwangjun Kim

Reg. 43335

Patent agent

Benest Law Office PC

Chatsworth, CA · 91311

646-886-2038

Michael T W Kim

Reg. 82903

Patent agent

Morrison and Foerster

Palo Alto, CA · 94304

650-544-0047

Michelle C Kim

Reg. 51881

Patent attorney

Sheppard Mullin Richter & Hampton LLP

Los Angeles, CA · 90071

213-617-4173

Mike S Kim

Reg. 72867

Patent attorney

Acushnet Company

Carlsbad, CA · 92010

760-603-5264

Mincheol Kim

Reg. 51306

Patent attorney

Knobbe Martens Olson & Bear LLP

Irvine, CA · 92614

949-721-5290

Misook Kim

Reg. 74709

Patent attorney

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Palo Alto, CA · 94304

650-304-2946

Na Yeon Kim

Reg. 81442

Patent attorney

Palo Alto, CA · 94306

650-858-6072

Nam H Kim

Reg. 64160

Patent attorney

Sheppard Mullin Richter & Hampton LLP

San Diego, CA · 92130

858-720-8900

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.