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 Hoyt and Knight, Matt Knight/Prose.Progress, Inc., and Morgan, Lewis & Bockius LLP.

Top cities in California

All practitioners in California

George M Knight

Reg. 33409

Patent attorney

Hoyt and Knight

Pioneer, CA · 95666

209-295-5223

Matthew Wayne Knight

Reg. 36846

Patent attorney

Matt Knight/Prose.Progress, Inc.

Kentfield, CA · 94904

323-537-6980

Sadie E. Knight

Reg. 74539

Patent agent

Morgan, Lewis & Bockius LLP

San Francisco, CA · 94105-1596

415-442-1000

Marc Ryan Knittel

Reg. 55333

Patent agent

Splunk

San Francisco, CA · 94107

415-510-7806

Rick H Knock

Reg. 44841

Patent attorney

Clements and Knock, LLP

San Diego, CA · 92108

619-686-6900

Aeree Ko

Reg. 75981

Patent agent

Palo Alto, CA · 94301

650-433-5622

Cheng C Ko

Reg. 54227

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

San Diego, CA · 92101-3575

619-234-5000

Christine J Ko

Reg. 72994

Patent attorney

Anaheim, CA · 92807

714-974-5683

Jenny G Ko

Reg. 44190

Patent attorney

Siemens Corp.

Mountain View, CA · 94043

Jonathan L Ko

Reg. 71307

Patent attorney

Venable LLP

Los Angeles, CA · 90067

310-229-9900

Steve S. Ko

Reg. 58757

Patent attorney

Raj Abhyanker LLP

Palo Alto, CA · 94301

650-326-1313

Suk Moon Ko

Reg. 56388

Patent attorney

Newport Beach, CA · 92660

714-404-6603

Alvin S Koan

Reg. 68468

Patent attorney

ScienBiziP, P.C.

Los Angeles, CA · 90071

213-426-1774

Akiko Kobayashi

Reg. 44843

Patent agent

LambentIP

Indio, CA · 92203

760-845-2403

Kennedy Koblin

Reg. 53147

Patent attorney

Castro Valley, CA · 94546

510-566-6825

John G Koch

Reg. 53148

Patent agent

San Ramon, CA · 94583

510-517-9193

Kregg A. Koch

Reg. 63035

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

310-551-3450

Jessica Karolina Kocinski

Reg. 901287

Limited recognition

University of San Diego School of Law

San Diego, CA · 92110

619-260-7470

H Henry Koda

Reg. 27729

Patent attorney

DLA Piper, LLP

Los Angeles, CA · 90067

310-595-3000

Carolyn T Koenig

Reg. 42755

Patent agent

LIFE TECHNOLOGIES CORPORATION

Carlsbad, CA · 92008

650-244-1611

Mark S Koenig

Reg. 54232

Patent agent

Sunnyvale, CA · 94086

408-888-4944

Jeffery W Koepke

Reg. 45561

Patent agent

Irvine, CA · 92602

714-832-2980

Steven C Koerber

Reg. 54233

Patent agent

Mintz Levin Cohn Ferris Glovsky and Popeo, PC

San Diego, CA · 92130

858-314-1495

Gregory Joseph Koerner

Reg. 38519

Patent attorney

Redwood Patent Law

Redwood City, CA · 94065

650-637-1728

Daniel Kogan

Reg. 62373

Patent attorney

Ventana Medical Systems, Inc.

Mountain View, CA · 94043

408-207-4200

David Kogan

Reg. 50868

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Woodland Hills, CA · 91367

818-715-7025

Ai Leen Koh

Reg. 77267

Patent attorney

Morgan, Lewis & Bockius, LLP

Palo Alto, CA · 94304-1124

650-843-7823

Jennifer Koh

Reg. 56394

Patent attorney

Allen & Overy LLP

Palo Alto, CA · 94301

650-388-1650

Elisha B. Kohanbash

Reg. 83898

Patent agent

Caldwell Law

Santa Monica, CA · 90401

310-565-9995

Katharine Kohles

Reg. 44845

Patent attorney

Rolling Hills Estates, CA · 90274

310-375-1490

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.