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 Pillsbury Winthrop Shaw Pittman LLP, O'Banion & Ritchey, LLP, and Elliott N. Kramsky.

Top cities in California

All practitioners in California

Price Q Kramer

Reg. 81063

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

Palo Alto, CA · 94304

650-233-4540

Robert F Kramer

Reg. 51242

Patent agent

O'Banion & Ritchey, LLP

Sacramento, CA · 95814

916-498-1010

Elliott Nason Kramsky

Reg. 27812

Patent attorney

Elliott N. Kramsky

Woodland Hills, CA · 91364

818-224-3651

Diane Gabl Kratz

Reg. 67281

Patent attorney

Dolby Laboratories

San Francisco, CA · 94103

415-558-0200

Andrew E Krause

Reg. 76276

Patent attorney

Irell & Manella, LLP

Los Angeles, CA · 90067

310-277-1010

Eric A Krause

Reg. 62329

Patent attorney

San Francisco, CA · 94111

415-343-4486

Randall C Krause

Reg. 53158

Patent agent

Campbell, CA · 95008

408-378-4080

Juergen Krause-Polstorff

Reg. 41127

Patent attorney

Saratoga, CA · 95070

Warren J Krauss

Reg. 25543

Patent attorney

Sedgwick Law

San Francisco, CA · 94104

415-781-7900

Alexander Krayner

Reg. 60854

Patent attorney

Beverly Hills, CA · 90212

310-227-8877

George G. Krboyan

Reg. 80418

Patent agent

Enso Law L.L.P

Sherman Oaks, CA · 91403

818-822-9772

Brian D. Krechman

Reg. 60399

Patent attorney

U.S. District Court

Los Angeles, CA · 90012

213-894-3885

Matthew I Kreeger

Reg. 56398

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-7000

Max J Kreifeldt

Reg. 63152

Patent agent

La Mesa, CA · 91941

619-312-0526

Lance M Kreisman

Reg. 39256

Patent attorney

Peninsula Patent Group

Santa Cruz, CA · 95060

650-468-9654

Alexander M. Kremen

Reg. 73872

Patent agent

San Francisco, CA · 94115

510-325-8275

Michelle Esteban Kremen

Reg. 59880

Patent agent

Splunk Inc.

San Francisco, CA · 94107

415-848-8413

Daniel M. Kremer

Reg. 83550

Patent agent

Womble Bond Dickinson

San Diego, CA · 92121

858-313-1406

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

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.