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 Sheppard Mullin Richter & Hampton LLP, Knobbe, Martens, Olson & Bear LLP, and Lewis Roca Rothgerber Christie LLP.

Top cities in California

All practitioners in California

Eric M Nelson

Reg. 43829

Patent attorney

Knobbe, Martens, Olson & Bear LLP

San Deigo, CA · 92130

858-707-4000

Eustus D Nelson

Reg. 58376

Patent attorney

Colton, CA · 92324

914-361-9356

Farrell L Nelson

Reg. 46952

Patent attorney

Long Beach, CA · 90808

562-598-8513

Gary James Nelson

Reg. 44257

Patent attorney

Lewis Roca Rothgerber Christie LLP

Glendale, CA · 91203

626-795-9900

Gregory K Nelson

Reg. 46953

Patent attorney

Weeks Kaufman and Johnson

Solana Beach, CA · 92075

858-794-2140

Manuel C Nelson

Reg. 44969

Patent attorney

Sheppard Mullin Richter & Hampton LLP

Los Angeles, CA · 90071-1422

213-617-5476

Michael D Nelson

Reg. 26009

Patent attorney

Michael D Nelson, Atorney

Pleasanton, CA · 94566

925-381-8673

Philip M. Nelson

Reg. 62676

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Seth E. Nelson

Reg. 69841

Patent attorney

Oakland, CA · 94610

415-418-8904

William K Nelson

Reg. 63501

Patent attorney

Sierra IP Law, PC

Fresno, CA · 93755-5637

559-436-3800

Zachary A Nemirovsky

Reg. 80969

Patent attorney

Arnold & Porter Kaye Scholler LLP

Palo Alto, CA · 94306

650-759-5925

Joy Lynn B Nemirow

Reg. 67163

Patent attorney

Sheppard Mullin Richter & Hampton LLP

Menlo Park, CA · 94025

650-815-2600

Alan S Neo

Reg. 64789

Patent agent

Palo Alto, CA · 94303

650-799-4249

Rhea C Nersesian

Reg. 55488

Patent agent

Roche Molecular Systems

Pleasanton, CA · 94588

925-730-8566

James E Nesbitt

Reg. 54575

Patent agent

Genentech, Inc.

South San Francisco, CA · 94080

650-225-4359

Michael J Nesler

Reg. 55489

Patent attorney

Cytokinetics

South San Francisco, CA · 94080

650-624-3228

Joe S Netikosol

Reg. 72548

Patent attorney

Winston & Strawn LLP

Los Angeles, CA · 90071-1543

213-615-1912

Clarke William Neumann· Jr

Reg. 39789

Patent attorney

Progenity, Inc.

San Diego, CA · 92121

760-494-1554

Deborah Aleta Neville

Reg. 34886

Patent attorney

Palo Alto, CA · 94306

650-384-3638

Elizabeth A Nevis

Reg. 55490

Patent attorney

Proxigee Legal Transactions

Santa Clara, CA · 95054

408-980-0984

Samuel W Newberry

Reg. 78850

Patent agent

Nicholson De Vos Webster & Elliott LLP

San Jose, CA · 95113

309-333-3531

Aidan G. Newboles

Reg. 81368

Patent agent

Aliso Viejo, CA · 92656

949-855-1246

Matthew Arlen Newboles

Reg. 36224

Patent attorney

Stetina Brunda Garred and Brucker

Aliso Viejo, CA · 92656

949-855-1246

Keith A Newburry

Reg. 38980

Patent attorney

Law Office of Keith Newburry, APC

Irvine, CA · 92623

949-648-8836

Dix A Newell

Reg. 24276

Patent attorney

Walnut Creek, CA · 94596

925-934-1444

Jennifer E Newell

Reg. 70029

Patent agent

Chevron Oronite

Richmond, CA · 94802

510-242-3992

Ryan M. Newell

Reg. 79477

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Clayton D. Newlon

Reg. 84266

Patent agent

San Clemente, CA · 92672

949-484-3403

David L Newman

Reg. 37196

Patent attorney

Mahamedi IP Law LLP

Redwood City, CA · 94065

708-214-9198

Elizabeth P Newman

Reg. 82834

Patent agent

San Diego, CA · 92130

858-209-9302

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.