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 Mindspeed Technologies, Inc., Fenwick & West, and Apple Inc..

Top cities in California

All practitioners in California

Keith A Kind

Reg. 42735

Patent attorney

Mindspeed Technologies, Inc.

Newport Beach, CA · 92660

949-579-3291

Malashaan Kind

Reg. 70670

Patent attorney

Fenwick & West

Mountain View, CA · 94041

650-335-7686

Darrell D Kinder· Jr.

Reg. 57460

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-974-6473

Anthony S. King

Reg. 49063

Patent attorney

WPAT, P.C., Intellectual Property Attorneys

Newport Beach, CA · 92660

949-387-2885

Christopher Penoyer King

Reg. 60985

Patent attorney

Los Altos, CA · 94024

408-472-6636

Eric T King

Reg. 44188

Patent attorney

Canon Inc

Irvine, CA · 92612-2411

310-562-7081

Grace E. King

Reg. 72013

Patent attorney

Deloitte

Los Angeles, CA · 90013

213-688-0800

Jeffrey S King

Reg. 58791

Patent agent

Gilman, Clark & Hunter LLC

San Diego, CA · 92130

858-480-5530

John R King

Reg. 34362

Patent attorney

Knobbe Martens Olson and Bear

Irvine, CA · 92614

949-760-0404

Laura M King

Reg. 54461

Patent attorney

Matrix Law Group, LLP

Carlsbad, CA · 92008

858-810-8869

Michael S King

Reg. 51885

Patent attorney

Solar Turbines Incorporated

San Diego, CA · 92123

858-694-6793

Patrick Thomas King

Reg. 28231

Patent attorney

Law Office of Patrick T. King

Walnut Creek, CA · 94595

831-840-5240

Robert Neil King

Reg. 36388

Patent attorney

Los Altos, CA · 94024

650-965-2237

Thomas B King

Reg. 69721

Patent attorney

Hueston Hennigan LLP

Newport Beach, CA · 92660

949-287-5940

Curtis Durell Kinghorn

Reg. 33926

Patent attorney

Volcano Corporation

San Diego, CA · 92130

858-720-4091

Adam M Kinsey

Reg. 63662

Patent agent

San Diego, CA · 92130

415-310-5240

Jason D Kipnis

Reg. 40680

Patent attorney

Wilmer Cutler Pickering Hale and Dorr LLP

Palo Alto, CA · 94304

650-600-5036

Stefan James Kirchanski

Reg. 36568

Patent attorney

Zuber Lawler & Del Duca LLP

Los Angeles, CA · 90017

213-596-5654

Dimitri Kirimis

Reg. 71487

Patent attorney

Irvine, CA · 92618

949-390-7163

Ashley L Kirk

Reg. 51261

Patent attorney

Willenken, Wilson. Loh and Delgado

Los Angeles, CA · 90017

213-955-9240

Fikret N Kirkbir

Reg. 57947

Patent agent

Studio City, CA · 91604

323-354-2380

Mark D Kirkland

Reg. 40048

Patent attorney

Fish & Richardson P.C.

Redwood City, CA · 94063

650-839-5000

Anita McGowan Kirkpatrick

Reg. 32617

Patent agent

San Diego, CA · 92127

858-451-9769

Sheila R Kirschenbaum

Reg. 44835

Patent attorney

San Diego, CA · 92162-0624

Shrut Kirti

Reg. 77834

Patent attorney

Ropes & Gray LLP

East Palo Alto, CA · 94303

650-671-4749

James David Kiryakoza

Reg. 57049

Patent attorney

Block, Inc.

San Francisco, CA · 94103

415-335-8125

Eugenia Kiselgof

Reg. 65258

Patent attorney

Genentech, Inc.

South San Francisco, CA · 94080

267-302-9458

Rosemary C Kiser

Reg. 77320

Patent agent

California Institute of Technology

Pasadena, CA · 91125

626-395-4976

Jennifer L Kisko

Reg. 56907

Patent attorney

Scripps Research

La Jolla, CA · 92037

858-784-1000

Jamie H Kitano

Reg. 67510

Patent attorney

Coherus BioSciences, Inc.

Redwood City, CA · 94305

650-649-3522

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.