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 Knobbe, Martens, Olson & Bear, LLP, Mdxhealth, Inc., and Knobbe Martens Olson & Bear.

Top cities in California

All practitioners in California

Damien D Jorgensen

Reg. 67663

Patent attorney

Mdxhealth, Inc.

Irvine, CA · 92618

949-812-6979

Kemarie Jorgensen

Reg. 82404

Patent attorney

Knobbe Martens Olson & Bear

Irvine, CA · 92614

212-849-3060

Norman Eric Jorgensen

Reg. 37158

Patent attorney

Law Office of N Eric Jorgensen

San Jose, CA · 95132

408-929-4058

Matthew S Jorgenson

Reg. 54203

Patent attorney

Boston Scientific Corporation

Valencia, CA · 91355

310-272-8413

Ariana Jorissen

Reg. 50132

Patent attorney

Advanced Bionics, LLC

Valencia, CA · 91335

661-362-4514

Parisa Jorjani

Reg. 46813

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-7000

Daryl Craig Josephson

Reg. 37365

Patent attorney

San Carlos, CA · 94070

650-888-3737

Kaushik M. Joshi

Reg. 66761

Patent agent

Tustin, CA · 92780

517-897-5921

Kiran Joshi

Reg. 75650

Patent agent

Quantumscape

San Jose, CA · 95110

408-623-6240

Mandar A Joshi

Reg. 79149

Patent attorney

Bozicevic Field & Francis LLP

Redwood City, CA · 94065

650-833-7712

Peter Jovanovic

Reg. 69128

Patent attorney

Dell, Inc.

Santa Clara, CA · 95054

408-755-8028

Florence Jovic

Reg. 65572

Patent attorney

Cytokinetics

South San Francisco, CA · 94080

650-624-3000

Gerald Patrick Joyce· III

Reg. 37648

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-845-2204

Timothy H Joyce

Reg. 38197

Patent attorney

Bayer West Coast Corporation

Berkeley, CA · 94710

510-705-7797

Agnes Juang

Reg. 55310

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Urania Juang

Reg. 60799

Patent attorney

Mint Systems Corporation

San Jose, CA · 95112

408-573-8885

Mandy Jubang

Reg. 45884

Patent attorney

Google Inc.

Mountain View, CA · 94043

508-879-7330

Linda R Judge

Reg. 42702

Patent attorney

WakeUp Legal

Blairsden-Graeagle, CA · 96103

650-678-3450

Joseph Juliano

Reg. 54780

Patent attorney

Honda Patents & Technologies

Torrance, CA · 90501

310-781-4900

Moon Hyun Jung

Reg. 67391

Patent agent

San Jose, CA · 95129

858-525-2469

Soyoung Jung

Reg. 58249

Patent attorney

Katten Muchin Roseman LLP

Los Angeles, CA · 90067-3012

310-788-4569

Tae H Jung

Reg. 66391

Patent agent

Samsung Semiconductor, Inc.

San Jose, CA · 95134

408-914-8450

Tianmin Mo Jung

Reg. 61815

Patent agent

Sunnyvale, CA · 94086

858-692-9167

Keith M. Jurek

Reg. 75850

Patent attorney

Baker Botts LLP

Palo Alto, CA · 94304-1007

650-739-7566

Thomas Einar Jurgensen

Reg. 34195

Patent attorney

Optima Law Group

San Diego, CA · 92121

858-526-6556

Suganda Jutamulia

Reg. 54936

Patent agent

Berkeley, CA · 94703

510-486-8762

Mark D Kachner

Reg. 53084

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

310-551-3450

Geeta Kadambi

Reg. 64446

Patent agent

Fremont, CA · 94539

510-252-1277

Paul A Kafadar

Reg. 62182

Patent attorney

SONOS, Inc.

Santa Barbara, CA · 93101

805-965-3001

Vivi Paraskevi Kafalenos

Reg. 32903

Patent attorney

Alameda, CA · 94501

650-464-9902

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.