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 Nicholson De Vos Webster & Elliott, LLP, Patent2ip LLC, and Google Inc..

Top cities in California

All practitioners in California

Tue Nguyen

Reg. 53390

Patent agent

Patent2ip LLC

Pleasanton, CA · 94588

925-227-1190

Van H Nguyen

Reg. 56571

Patent attorney

Google Inc.

Mountain View, CA · 94043

Inzer C. Ni

Reg. 76047

Patent agent

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

212-849-3044

Michael Ni

Reg. 61519

Patent attorney

Hacienda Heights, CA · 91745

626-315-8171

Peggy Pei-Wen Ni

Reg. 75956

Patent attorney

Exelixis, Inc.

Alameda, CA · 94502

650-837-7000

Yingchun Ni

Reg. 73091

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2390

Mitch M Niayesh

Reg. 53391

Patent attorney

Law Offices Of Mitch M Niayesh

San Francisco, CA · 94124

415-648-6300

Andrea S Nichols

Reg. 57417

Patent attorney

Fenwick & West LLP

Mountain View, CA · 94041

650-988-8500

Peter A Nichols

Reg. 47822

Patent attorney

Pacesetter, Inc.

Sylmar, CA · 91392-9221

818-493-2323

David F. Nicholson

Reg. 62888

Patent attorney

Nicholson De Vos Webster & Elliott, LLP

San Jose, CA · 95113

408-675-0441

David R Nicholson

Reg. 38981

Patent attorney

USDA ARS

Albany, CA · 94710

510-559-5641

Frederick A Nicholson

Reg. 72284

Patent agent

Schwegman Lundberg Woessner

San Jose, CA · 95113

408-278-4054

Matthew N. Nicholson

Reg. 62889

Patent attorney

Nicholson De Vos Webster & Elliott, LLP

San Jose, CA · 95113

408-675-0441

Robert Nick

Reg. 51202

Patent agent

UFe Patent Engineering

Laguna Hills, CA · 92654

949-702-4124

Rebecca A. Nickell

Reg. 75062

Patent attorney

Haley Guiliano LLP

San Jose, CA · 95113

669-213-1059

Alyson Helena Nickols

Reg. 77536

Patent attorney

Arnold & Porter Kaye Scholer LLP

Palo Alto, CA · 94306-3807

650-448-3073

Shihong Li Nicolaou

Reg. 46960

Patent agent

San Diego, CA · 92117

858-717-2985

Alex Y Nie

Reg. 60523

Patent attorney

Sheppard Mullin Richter & Hampton LLP

Menlo Park, CA · 94025-4111

650-815-2600

William Samuel Niece

Reg. 47824

Patent attorney

Ralls Gruber & Niece, LLP

San Mateo, CA · 94402

650-458-4042

Dylan A. Niederland

Reg. 82058

Patent agent

Huntington Beach, CA · 92646

714-478-7767

Scott T. Niedzwiecki

Reg. 61282

Patent attorney

NeurogesX, Inc.

San Carlos, CA · 94070

650-508-2116 EXT 148

Joe Nieh

Reg. 46961

Patent attorney

West Covina, CA · 91791

626-872-7670

Richard J Niehuser

Reg. 44260

Patent attorney

Santa Cruz, CA · 95060

831-915-2896

John E Nielsen

Reg. 53392

Patent attorney

Sentinel IP, Inc.

Carmel, CA · 93923

510-384-1392

Kenneth R Nielsen

Reg. 69948

Patent attorney

Knobbe Martens Olson & Bear LLP

Irvine, CA · 92614

949-760-0404

Steven A Nielsen

Reg. 54699

Patent attorney

Allman and Nielsen. P.C.

Larkspur, CA · 94939

415-272-8210

Sabena N Nigam

Reg. 72591

Patent agent

San Diego, CA · 92129

858-780-0165

Alexandros Nikolaidis

Reg. 84755

Patent agent

Niki IP Services

Long Beach, CA · 90807

310-279-8351

Kevin M. Ninomiya

Reg. 81246

Patent attorney

Downey, CA · 90242

562-334-2017

Karna J Nisewaner

Reg. 50665

Patent attorney

Intuit Corp.

Mountain View, CA · 94043

650-944-2118

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.