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 Daylight Law PC, Lewis, Kohn & Walker LLP, and Wilson Sonsini Goodrich & Rosati.

Top cities in California

All practitioners in California

Isa M Kohls

Reg. 82719

Patent agent

Daylight Law PC

Palo Alto, CA · 94306

970-234-4253

David M Kohn

Reg. 53150

Patent attorney

Lewis, Kohn & Walker LLP

San Diego, CA · 92128

858-436-1336

Bridgett H. Kohno

Reg. 79395

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2334

Scott S Kokka

Reg. 51893

Patent attorney

Kokka & Backus, PC

Palo Alto, CA · 94306

650-566-9921

Lygeri E Kokkinakos

Reg. 42756

Patent attorney

Ridgecrest, CA · 93556

Scott E Kolassa

Reg. 55337

Patent attorney

Kilpatrick, Townsend & Stockton

Menlo Park, CA · 94025

650-324-6349

William J Kolegraff

Reg. 41125

Patent attorney

Law Office of Bill Kolegraff

Jamol, CA · 91935

619-401-8008

Daniel E. Kolker

Reg. 84831

Patent agent

Antheros Legal Advisors LLP

San Diego, CA · 92212

202-796-6251

Satyanarayana P Kolli

Reg. 66512

Patent agent

Spectrum Pharmaceuticals Inc.

Irvine, CA · 92618

949-743-9214

Donna H Kolnes

Reg. 38915

Patent attorney

Adobe Systems Incorporated

San Jose, CA · 95110

408-536-3268

Joseph L Komen

Reg. 68239

Patent agent

San Diego, CA · 92131

678-761-7625

Charlene Y Kon

Reg. 64350

Patent attorney

Fenwick & West LLP

Mountain View, CA · 94041

650-335-4942

Goutham Kondapalli

Reg. 71166

Patent attorney

Arista Networks

Santa Clara, CA · 95054

408-547-5765

Pallavi Kondapalli

Reg. 80618

Patent attorney

Mountain View, CA, CA · 94039

858-261-9042

Leroy L Kondo

Reg. 54235

Patent attorney

Los Angeles, CA · 90048

323-931-0049

Matte I. Kondryszyn

Reg. 77111

Patent agent

Dunlop Sports Americas

Huntington Beach, CA · 92647

509-999-4075

Andrew B Kong· Jr.

Reg. 74830

Patent attorney

San Francisco, CA · 94118

323-610-8425

Lawrence B Kong

Reg. 49043

Patent attorney

Amgen Inc.

South San Francisco, CA · 94080

650-244-2910

Leon M Kong

Reg. 75631

Patent agent

Davis Wright Tremaine LLP

San Francisco, CA · 94111

415-276-4862

Lin Kong

Reg. 50196

Patent agent

Dahyee Law Group

Newark, CA · 94560

650-257-0075

Xianhua Kong

Reg. 69431

Patent agent

Applied Materials

Santa Clara, CA · 95051

408-547-7620

Andrew J. Koning

Reg. 60764

Patent attorney

Cooley LLP

San Diego, CA · 92121-1909

858-550-6129

William Kurtis Konrad

Reg. 28868

Patent attorney

Konrad Raynes and Victor LLP

Beverly Hills, CA · 90212

310-556-7983

Antoinette Frances Konski

Reg. 34202

Patent attorney

Foley & Lardner LLP

Palo Alto, CA · 94304

650-856-3700

Konstantinos Konstantinides

Reg. 67993

Patent agent

Dolby Laboratories

Sunnyvale, CA · 94085

408-330-3391

Mark T. Koo

Reg. 69970

Patent attorney

Credere Law

Palo Alto, CA · 94303

510-396-8596

Sue J. Koo

Reg. 84212

Patent agent

Norton Rose Fulbright US LLP

Los Angeles, CA · 90071

213-892-9297

Tae Woong Koo

Reg. 59649

Patent attorney

Morgan, Lewis & Bockius LLP

Palo Alto, CA · 94304

650-843-7246

Young Seok Koo

Reg. 76255

Patent attorney

Ladas & Parry LLP

Los Angeles, CA · 90036

314-479-2768

Benjamin C Koodrich

Reg. 61700

Patent attorney

Baker Botts L.L.P.

San Francisco, CA · 94111

415-291-6200

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.