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 Inhibrx, Inc., Atara Biotherapeutics, Inc., and Weintraub Tobin Chediak Coleman Grodin.

Top cities in California

All practitioners in California

Lisa Karen Kreppel

Reg. 56970

Patent agent

Inhibrx, Inc.

La Jolla, CA · 22037

858-500-7838

Mark T Kresnak

Reg. 42767

Patent attorney

Atara Biotherapeutics, Inc.

South San Francisco, CA · 94080

650-491-5765

Bernhard Kreten

Reg. 27037

Patent attorney

Weintraub Tobin Chediak Coleman Grodin

Sacramento, CA · 95814

916-558-6100

Edward Owen Kreusser

Reg. 38523

Patent attorney

Edward O. Kreusser dba Reexam Man

Pasadena, CA · 91101

858-485-0513

Jesse L. Kriege

Reg. 78929

Patent agent

Akido Labs, Inc.

San Clemente, CA · 92672

949-533-8085

Mark H Krietzman

Reg. 41128

Patent attorney

Baker Hostetler LLP

Costa Mesa, CA · 90274

714-966-8834

Venkatesh B Krishnamoorthy

Reg. 52490

Patent attorney

Venkatesh Krishnamoorthy

San Ramon, CA · 94583-6521

650-292-0469

Shankar Krithivasan

Reg. 67286

Patent attorney

Qualcomm Inc

San Jose, CA · 95110

408-652-0426

Alexander S Krois

Reg. 78751

Patent attorney

Thompson Hine LLP

San Mateo, CA · 94402

650-265-0937

Michael Kross

Reg. 37662

Patent attorney

Mill Valley, CA · 94942-688

415-393-4913

Sashank Krothapally

Reg. 83062

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

415-217-8380

Alan Martin Krubiner

Reg. 26289

Patent attorney

Santa Rosa, CA · 95404

707-694-6239

Charles Eugene Krueger

Reg. 30077

Patent attorney

Law Office Of Charles E Krueger

Walnut Creek, CA · 94596

925-944-3320

Paul M Krueger

Reg. 64944

Patent attorney

Lowenstein Sandler LLP

Palo Alto, CA · 94301

650-433-5722

Richard H Krukar

Reg. 53162

Patent attorney

Loza & Loza LLP

Upland, CA · 91786

505-314-1310

Maile V. Kruse

Reg. 66583

Patent attorney

Illumina, Inc.

San Diego, CA · 92122

858-943-5761

Norman J Kruse

Reg. 35235

Patent attorney

Forty Seven, Inc

Menlo Park, CA · 94025

650-352-4138

Dmitry S Kryndushkin

Reg. 71818

Patent agent

San Diego, CA · 92127

194-974-20544

Nuritsa S Ksachikyan

Reg. 57050

Patent attorney

Valle Makoff LLP

Los Angeles, CA · 90049

310-476-0300

Edward C H Ku

Reg. 75304

Patent attorney

Cupertino, CA · 95014

408-316-8190

Katharine Ku

Reg. 30078

Patent agent

Stanford, CA · 94305

650-868-3694

Roger Chung Kuan

Reg. 56558

Patent attorney

McDermott Will & Emery

Menlo Park, CA · 94025

650-815-7430

Jeffrey Stephen Kubinec

Reg. 36575

Patent attorney

Genentech, Inc.

South San Francisco, CA · 94080

650-225-8228

John M Kubodera

Reg. 45984

Patent attorney

Intuitive Surgical, Inc.

Sunnyvale, CA · 94086

408-523-2358

Glenn M Kubota

Reg. 44197

Patent attorney

Kubota & Basol LLP

Los Angeles, CA · 90071

213-408-0791

Stephen A. Kuchta

Reg. 67744

Patent agent

Adivo Associates

San Francisco, CA · 94104

860-455-6662

Chris Kuczynski

Reg. 58251

Patent attorney

Carlsbad, CA · 92011

248-770-8600

Jonathan P Kudla

Reg. 47724

Patent agent

Global Tel*Link

San Francisco, CA · 94111

415-300-4316

Parker L Kuhl

Reg. 69867

Patent attorney

YHE Law LLP

Lafayette, CA · 94549

415-656-8913

Christian V Kuhlen

Reg. 54752

Patent agent

Rancho Santa Fe, CA · 92067

858-759-0898

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.