California

Patent attorneys in California

California hosts 9,567 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 Fish IP Law, LLP, QuantumScape Battery, Inc., and Law Offices of Daniel S. Kim.

Top cities in California

All practitioners in California

Brian J. Kim

Reg. 74665

Patent attorney

Fish IP Law, LLP

Irvine, CA · 92614

949-943-8330

Chang H Kim

Reg. 42727

Patent attorney

Palo Alto, CA · 94306

408-691-2455

Cheol Kim

Reg. 76594

Patent agent

QuantumScape Battery, Inc.

San Jose, CA · 95110

202-499-8997

Cy Chooyoun Kim

Reg. 53122

Patent attorney

Mountain View, CA · 94043

408-453-6149

Daniel S Kim

Reg. 51877

Patent attorney

Law Offices of Daniel S. Kim

Los Angeles, CA · 90010

213-282-8387

David Tawhee Kim

Reg. 74597

Patent attorney

Sheppard Mulin Richter & Hampton LLP

Palo Alto, CA · 94301

650-815-2600

David G. Kim

Reg. 73265

Patent attorney

Friedland Cianfrani LLP

Irvine, CA · 92614

949-734-7451

David S Kim

Reg. 57143

Patent agent

DK Milestone, LLC

Anaheim, CA · 92801

657-549-4542

Do Hee Kim

Reg. 64300

Patent agent

WTA Patents

Santa Clara, CA · 95054

650-547-5457

Dongyul Kim

Reg. 57048

Patent attorney

Perkins Coie LLP

Menlo Park, CA · 94025

650-838-4387

Dwight Y. Kim

Reg. 71225

Patent attorney

Snell & Wilmer LLP

Costa Mesa, CA · 92626

714-427-7439

Emil Kim

Reg. 48284

Patent attorney

Camarillo, CA · 93012

805-383-7506

Eric J Kim

Reg. 71483

Patent attorney

PayPal Inc.

San Jose, CA · 95131

408-967-5259

Esther E. Kim

Reg. 76454

Patent attorney

Arcadia, CA · 91066

915-637-3480

Esther Kim

Reg. 62838

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-7562

Eugene G Kim

Reg. 46267

Patent attorney

Twilio Inc.

San Francisco, CA · 94105

605-366-1024

Frederick Dong Kim

Reg. 38513

Patent attorney

Kim & Stewart LLP

San Jose, CA · 95113

650-380-9760

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

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?

9,567 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.