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 Advanced Sterilization Products, Innovation Capital Law Group, LLP, and Fenwick & West.

Top cities in California

All practitioners in California

Shinn-Jieh Lin

Reg. 55932

Patent attorney

Oakley, CA · 94561

510-213-2753

Shufan Lin

Reg. 84593

Patent agent

Yorba Linda, CA · 92887

949-975-9703

Szu-Min Lin

Reg. 55385

Patent agent

Advanced Sterilization Products

Irvine, CA · 92618

949-453-6484

Vic Y Lin

Reg. 43754

Patent attorney

Innovation Capital Law Group, LLP

Irvine, CA · 92612

949-954-5430

Wen-Yao E Lin

Reg. 70173

Patent agent

Oxnard, CA · 93030

408-234-9236

Xiao Lin

Reg. 75444

Patent agent

Fenwick & West

Mountain View, CA · 94041

650-335-4916

Yinan Lin

Reg. 74667

Patent attorney

Dickinson Wright RLLP

Mountain View, CA · 94043

408-701-6127

Nancy J Linck

Reg. 31920

Patent attorney

Linck Consulting

San Diego, CA · 92103

202-640-0613

Donald Edward Lincoln

Reg. 34213

Patent attorney

Salinas, CA · 93907

831-320-3641

Nicholas A Lind

Reg. 68250

Patent attorney

Bryan Cave LLP

San Francisco, CA · 94105

415-675-3467

Gordon Reinhold Lindeen· III

Reg. 33192

Patent attorney

Loza & Loza, LLP

Upland, CA · 91786

877-406-5164

Simon H. Linder

Reg. 67025

Patent agent

Saratoga, CA · 95070

408-866-5340

John C Lindgren

Reg. 36584

Patent attorney

Tessera Technologies, Inc.

San Jose, CA · 95134

613-698-8841

Roger A. Lindley

Reg. 66113

Patent agent

Applied Materials, Inc.

Sunnyvale, CA · 94085

408-584-0828

Cameron J. Lindsay

Reg. 81963

Patent attorney

Lowenstein Sandler

Palo Alto, CA · 94301

650-847-4309

Jonathan M Lindsay

Reg. 45810

Patent attorney

Irell & Manella LLP

Newport Beach, CA · 92660

949-760-0991

Vincent Yung Ling

Reg. 67145

Patent attorney

Munger, Tolles & Olson LLP

Los Angeles, CA · 90071

213-683-9100

Susan Elaine Lingenfelter

Reg. 41156

Patent attorney

Amgen Inc

Thousand Oaks, CA · 91320

805-313-3010

Alexander Linger

Reg. 30532

Patent attorney

Northridge, CA · 91325

818-886-3305

Jason C. Linger

Reg. 76794

Patent attorney

Glaser Weil Fink Howard Avchen & Shapiro

Los Angeles, CA · 90067

310-553-3000

Deidre D Link

Reg. 57184

Patent attorney

Cetera Financial Group

El Segundo, CA · 90245

310-257-7474

Lawrence V Link· Jr

Reg. 24481

Patent agent

Studio City, CA · 91604

818-980-6258

Paul A Link

Reg. 53224

Patent agent

Martine Penilla & Gencarella, LLP

Sunnyvale, CA · 94085

408-774-6911

Roscoe T.H. Linstadt

Reg. 84238

Patent agent

San Diego, CA · 92117

805-636-9439

Lisa W Liou

Reg. 54275

Patent attorney

Arista Networks, Inc.

Santa Clara, CA · 95054

408-547-5775

Sandra Lee Lipkin

Reg. 47617

Patent attorney

Ventura, CA · 93006-3518

805-275-1861

Peter Adams Lipovsky

Reg. 32580

Patent attorney

US Navy - Office of the General Counsel

San Diego, CA · 92152

619-553-3824

Nicholas G. Lipperd

Reg. 83084

Patent agent

San Diego, CA · 92126

831-234-8725

Barret Lippey

Reg. 59266

Patent agent

Dolby Laboratories

San Francisco, CA · 94103

617-306-2646

Vincent P Liptak

Reg. 53225

Patent attorney

Rancho Santa Fe, CA · 92067

858-869-7829

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.