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 Morgan, Lewis & Bockius LLP, Skiermont Derby LLP, and Auris Health, Inc..

Top cities in California

All practitioners in California

Shawn C. Kooklan

Reg. 82348

Patent agent

Morgan, Lewis & Bockius LLP

Costa Mesa, CA · 92626

714-830-0600

Charles C. Koole

Reg. 60438

Patent attorney

Skiermont Derby LLP

Los Angeles, CA · 90017

213-788-4500

Jeffie A Kopczynski

Reg. 56395

Patent attorney

Auris Health, Inc.

Redwood City, CA · 94062

650-837-0374

Jenny L Kopfstein

Reg. 69641

Patent attorney

Palo Alto, CA · 94306

619-507-1181

Michael A Koplow

Reg. 69722

Patent attorney

Intuitive Surgical Inc.

Sunnyvale, CA · 94086

408-523-5689

Richard Steven Koppel

Reg. 26475

Patent attorney

Thousand Oaks, CA · 91362

805-523-1580

Ryan W Koppelman

Reg. 58307

Patent attorney

Ryan W. Koppelman Law PC

Los Angeles, CA · 90017

323-538-1421

Donald Joseph Koprowski

Reg. 24782

Patent attorney

Laguna Beach, CA · 92651

949-300-1698

Philip E K Koranteng

Reg. 80548

Patent agent

Redwood City, CA · 94063

703-586-3837

Donald Charles Kordich

Reg. 38213

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-229-5076

Emily Eugenia Kordyban

Reg. 41909

Patent attorney

Silva, Clasen & Raffalow

Sherman Oaks, CA · 91403

818-464-2815

Kenneth S Korea

Reg. 47716

Patent attorney

Coley Law

Los Gatos, CA · 95030

408-712-2045

Sarah M. Korman

Reg. 60105

Patent attorney

AMGEN INC.

Thousand Oaks, CA · 91320-1799

805-447-4061

Stephen Sandor Korniczky

Reg. 34853

Patent attorney

Sheppard, Mullin, Richter & Hampton, LLP

San Diego, CA · 92130

858-720-7443

Julia Kornilova

Reg. 64069

Patent attorney

Kornilova Law Group

West Hollywood, CA · 90069

213-534-7154

Charles G Korrell

Reg. 60131

Patent attorney

Hopkins & Carley

San Jose, CA · 95113

408-286-9800

George J Korsh

Reg. 63732

Patent agent

Kilpatrick Townsend & Stockton LLP

Menlo Park, CA · 94025

650-326-2400

Aleksandr Korzh

Reg. 67665

Patent attorney

Walnut Creek, CA · 94596

858-243-5266

Alexandra K Koseva

Reg. 75724

Patent attorney

Apple Inc.

Cupertino, CA · 95014-0642

408-761-7186

Christopher Paul Kosh

Reg. 42760

Patent attorney

Rambus, Inc.

Sunnyvale, CA · 94089

408-462-8903

Kristin Behrendt Kosinski

Reg. 45599

Patent attorney

Munck Wilson Mandala LLP

Los Angeles, CA · 90025

310-663-4391

Petri K Koskelainen

Reg. 62004

Patent agent

Nokia

Sunnyvale, CA · 94086

408-530-7600

Renee Mary Kosslak

Reg. 47717

Patent attorney

AbbVie Biotherapeutics, Corp.

Redwood City, CA · 94063

650-454-2338

Parvathi Kota

Reg. 65122

Patent attorney

SRI International

Menlo Park, CA · 94025

650-859-2000

Dominic M Kotab

Reg. 42762

Patent attorney

Zilka-Kotab, P.C.

San Jose, CA · 95112

408-971-2573

Shabneez R Kotadia

Reg. 53153

Patent attorney

BiTMICRO Networks, Inc.

Fremont, CA · 94538

510-743-3190

Amichai Kotev

Reg. 57668

Patent agent

Canon USA, Inc.

Irvine, CA · 92612

949-932-3313

Sujit B Kotwal

Reg. 43336

Patent attorney

KILPATRICK TOWNSEND & STOCKTON LLP

Menlo Park, CA · 94025

650-324-6365

Edmund J Koundakjian

Reg. 65576

Patent attorney

WILSON SONSINI GOODRICH & ROSATI, P.C.

San Diego, CA · 92130-3002

858-350-2250

Dennis Edward Kovach

Reg. 30189

Patent attorney

Dennis Kovach

Pleasanton, CA · 94588-4768

925-361-8728

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.