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 Kwan & Olynick LLP, Chiaoyun Kuo, and Law Office of Jung-hua Kuo.

Top cities in California

All practitioners in California

Chiaoyun Kuo

Reg. 53164

Patent agent

Chiaoyun Kuo

Irvine, CA · 92603

949-725-7954

Jung-Hua Kuo

Reg. 41918

Patent attorney

Law Office of Jung-hua Kuo

Los Altos, CA · 94024

650-988-8070

Paul Kuo

Reg. 69433

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-651-8777

Samantha PS Kuo

Reg. 81484

Patent attorney

Maschoff Brennan Gilmore Israelson & Mauriel

Irvine, CA · 92618

949-889-1674

Charu Shashikumar Kurani

Reg. 62913

Patent attorney

Facebook

Menlo Park, CA · 94025

650-546-1405

Jeffrey R Kurin

Reg. 41132

Patent attorney

Vierra Magen Marcus LLP

San Francisco, CA · 94105

415-489-4100

James Frederick Kurkowski

Reg. 35923

Patent attorney

Half Moon Bay, CA · 94019

650-533-6181

Babak Kusha

Reg. 51095

Patent agent

Townsend and Townsend and Crew LLP

Walnut Creek, CA · 94596

925-472-5006

Maxwell N. Kushner-Lenhoff

Reg. 75201

Patent agent

Long Beach, CA · 90807

323-829-0436

Carl Kustin· Jr

Reg. 24106

Patent attorney

Los Angeles, CA · 90004

323-938-6894

Karen L Kutash

Reg. 54415

Patent attorney

Sherman Oaks, CA · 91411

Bruce D Kuyper

Reg. 33937

Patent attorney

Ruttenberg IP Law, A Professional Corporation

Los Angeles, CA · 90067-2321

310-627-2277

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

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.