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 Kwan & Olynick LLP, Patent Law Works LLP, and McNeill PLLC.

Top cities in California

All practitioners in California

Reena Kuyper

Reg. 33830

Patent agent

Patent Law Works LLP

San Jose, CA · 95131

650-537-4509

Jane Kuzelka

Reg. 70963

Patent agent

McNeill PLLC

San Diego, CA · 92108

650-459-3887

Alexey G. Kuznetsov

Reg. 75103

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

312-532-0195

Yuri Kvichko

Reg. 74710

Patent attorney

Sacramento, CA · 95818

408-605-3127

Matthew W. Kwak

Reg. 83800

Patent attorney

San Francisco, CA · 94124

714-852-9104

Sanghyup Kwak

Reg. 80570

Patent attorney

O'Melveny & Myers LLP

Los Angeles, CA · 90067

310-246-6724

Avery Audrey Kwan

Reg. 46850

Patent attorney

Kwan & Olynick LLP

Berkly, CA · 94709

510-900-9501

Joanne Kwan

Reg. 60566

Patent attorney

South San Francisco, CA · 94080

650-837-8336

Jordan A. Kwan

Reg. 67954

Patent attorney

K&L Gates LLP

Palo Alto, CA · 94304

650-798-6734

Let Z Kwan

Reg. 53167

Patent attorney

Los Angeles, CA · 90015

818-919-0376

Stephanie L Kwan

Reg. 53168

Patent attorney

Kwan & Olynick LLP

Berkeley, CA · 94709

510-900-9501

Candice Jaesun Kwark

Reg. 75507

Patent agent

Irvine, CA · 92606

949-363-3358

Lois Marie Kwasigroch

Reg. 35579

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320-1799

805-447-6265

Alaina K. R. Kwasizur

Reg. 60257

Patent attorney

DivX, Inc.

San Diego, CA · 92121

858-882-0641

Ruchi Walia Kwatra

Reg. 59127

Patent attorney

Goodwin Procter LLP

Menlo Park, CA · 94025

650-752-3100

Oh Sang Kweon

Reg. 84292

Patent agent

UCLA David Geffen School of Medicine

Los Angeles, CA · 90095

208-272-0239

Brian C. Kwok

Reg. 58828

Patent attorney

Haynes and Boone, LLP

San Francisco, CA · 94104

415-293-8916

Daniel S Kwok

Reg. 69042

Patent attorney

Haynes & Boone, LLP

Costa Mesa, CA · 92626

949-202-3061

Edward C Kwok

Reg. 33938

Patent attorney

Cupertino, CA · 95014

408-504-9097

John K Kwok

Reg. 46851

Patent attorney

Kwok Patent Law

Mountain View, CA · 94043

650-447-5211

Steffi K. Kwok

Reg. 81379

Patent agent

Fremont, CA · 94539

317-734-9589

Tony C Y Kwok

Reg. 75895

Patent agent

Morrison & Foerster, LLP

Los Angeles, CA · 90017

213-892-5360

Adam W. Kwon

Reg. 75653

Patent attorney

Munger, Tolles & Olson LLP

Los Angeles, CA · 90071

213-683-9261

Younghye Kwon

Reg. 61470

Patent agent

Cupertino, CA · 95014

408-540-8779

Raymond K O Kwong

Reg. 37165

Patent attorney

Fremont, CA · 94539

408-219-1186

Richard Kwun

Reg. 74517

Patent attorney

Sacramento, CA · 95834

916-802-7997

Yong J. Kwun

Reg. 66490

Patent attorney

Lewis Roca Rothgerber Christie, LLP

Glendale, CA · 91203

626-795-9900

John S Kyle

Reg. 48318

Patent attorney

Cooley Godward LLP

San Diego, CA · 92121

858-550-6025

Hannah M. Kyme

Reg. 83288

Patent agent

Fenwick and West LLP

Mountain View, CA · 94041

571-268-5491

Chia-Hao La

Reg. 57729

Patent attorney

Google Inc.

Mountain View, CA · 94043

650-336-8791

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.