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 Knobbe, Martens, Olson & Bear, LLP, Mint Systems Corporation, and Google Inc..

Top cities in California

All practitioners in California

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

Theologos G Kafantaris

Reg. 64853

Patent attorney

Kafantaris Law Offices

Irvine, CA · 92618

614-214-8616

Mark D. Kafka

Reg. 59569

Patent agent

Genentech, Inc.

South San Francisco, CA · 94080

650-467-8688

Linda J. Kahl

Reg. 68999

Patent attorney

Walnut Creek, CA · 94595

925-283-1751

Saleh Kaihani

Reg. 74475

Patent attorney

Cognition IP

San Francisco, CA · 94105

650-772-5660

Samuel M Kais

Reg. 42705

Patent attorney

Medivation, Inc.

San Francisco, CA · 94105

415-549-5205

Anne Marie Kaiser

Reg. 37649

Patent attorney

Edwards Lifesciences

Irvine, CA · 92614

949-250-2574

John J. Kaiser

Reg. 77869

Patent agent

Kaiser Legal Services, Inc.

San Diego, CA · 92163

619-634-9910

Joshua D. Kaiser

Reg. 78347

Patent agent

Escondido, CA · 92027

818-357-8725

Lisa T Kajisa

Reg. 57516

Patent agent

Affymetrix, Inc.

Santa Clara, CA · 95051

408-731-5000

Kelvin K. Kakugawa

Reg. 61620

Patent agent

San Francisco, CA · 94123

415-305-3005

Brianne E.O. Kalach

Reg. 84067

Patent attorney

Bartko Pavia

San Francisco, CA · 94111

415-291-4514

Melineh Kalantar Ohanian

Reg. 902608

Limited recognition

University of San Francisco School of Law

San Francisco, CA · 94117-1080

818-626-7964

Reza Kalbasi

Reg. 76121

Patent agent

San Diego, CA · 92130

214-718-0546

Ingrid Kaldre

Reg. 66109

Patent attorney

Redwood City, CA · 94063

704-989-0550

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.