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 Herbert Smith Freehills Kramer (US) LLP, Kramer Alberti Lim & Tonkovich, and WILSON SONSINI GOODRICH & ROSATI.

Top cities in California

All practitioners in California

L. Samuel Anthony Kassatly

Reg. 32247

Patent attorney

San Jose, CA · 95120

408-323-5111

Kristopher B Kastens

Reg. 57517

Patent agent

Herbert Smith Freehills Kramer (US) LLP

Redwood City, CA · 94065

650-752-1700

Kevin Ray Kaster

Reg. 32704

Patent agent

Foster City, CA · 94404

650-573-6718

Courtney S. Kasuboski

Reg. 75443

Patent attorney

Kramer Alberti Lim & Tonkovich

Foster City, CA · 94404

440-829-1171

Irene N. Kasumba

Reg. 80086

Patent agent

WILSON SONSINI GOODRICH & ROSATI

PALO ALTO, CA · 94304-1050

202-920-8749

Abdollah Katbab

Reg. 45325

Patent attorney

ABK Patent Group, Inc.

Del Mar, CA · 92014

858-449-7078

Vinit G Kathardekar

Reg. 39461

Patent attorney

Cupertino, CA · 95014

650-533-7208

Arman Katiraei

Reg. 63098

Patent attorney

Los Angeles Patent Group

Beverly Hills, CA · 90211

424-250-0051

Zakia Kator

Reg. 67509

Patent agent

Corona, CA · 92883

714-469-7733

Olga M. Katsnelson

Reg. 68503

Patent attorney

Lewis Roca Rothgerber Christie LLP

Glendale, CA · 91209-9001

626-795-9900

Charles Bernard Katz

Reg. 36564

Patent attorney

PALO ALTO, CA · 94301

650-248-4448

Gail A Katz

Reg. 53101

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320

805-447-9722

Jeffrey N Katz

Reg. 74493

Patent attorney

Upland, CA · 91786

909-294-6529

Benjamin A Katzenellenbogen

Reg. 53102

Patent attorney

Knobbe Martens Olson and Bear LLP

Irvine, CA · 92614

949-760-0404

Albert K Kau

Reg. 40672

Patent attorney

Boston Scientific Corporation

Valencia, CA · 91355

661-949-4542

Craig Robert Kaufman

Reg. 34636

Patent attorney

TechKnowledge Law Group LLP

Redwood City, CA · 94065

415-902-0602

Karen Louise Kaufman

Reg. 57239

Patent attorney

Mountian View, CA · 94041

408-712-4776

Michael Alan Kaufman

Reg. 32998

Patent attorney

San Anselmo, CA · 94960

415-457-1102

Barry J Kauker

Reg. 71382

Patent agent

Stryker

San Jose, CA · 95138

408-754-2119

Joel A Kauth

Reg. 41886

Patent attorney

KPPB LLP

Long Beach, CA · 90806

949-852-0000

Lance G Kavanaugh

Reg. 51865

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3252

David Kaveh

Reg. 68640

Patent attorney

KPPB, LLP

Los Angeles, CA · 90017

949-852-0000

Chadd T Kawai

Reg. 41109

Patent attorney

The Walt Disney Company

Burbank, CA · 91521

818-560-8994

Ramsey F Kawar

Reg. 51866

Patent attorney

San Mateo, CA · 94402

650-430-0487

Sunil K KC

Reg. 67858

Patent agent

San Diego, CA · 92127

858-229-4890

Audrey Dickason Keane

Reg. 37367

Patent agent

Keane Enterprises

La Jolla, CA · 92037

619-997-3122

Stephen D Keane

Reg. 61491

Patent attorney

Morrison & Foerster LLP

San Diego, CA · 92130

858-314-5474

Carolyn R. Kearney

Reg. 78476

Patent agent

Kilpatrick Townsend & Stockton LLP

San Francisco, CA · 94111

732-379-8334

Brian J Keating

Reg. 39520

Patent attorney

Hillsborough, CA · 94010

415-515-5209

Eskinder Kebret

Reg. 66427

Patent attorney

Kebr.et Firm, APC

Berkeley, CA · 94704

877-353-2738

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.