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 Lowry Blixseth APC, Loza & Loza, LLP, and 1200 Pharma, LLC.

Top cities in California

All practitioners in California

Oliver C Loson

Reg. 73704

Patent agent

1200 Pharma, LLC

Culver City, CA · 90230

424-652-9375

Jeffrey J. Lotspeich

Reg. 45737

Patent attorney

Lee Hong Degerman Kang & Waimey

Los Angeles, CA · 90017

213-623-2221

Mikhail Lotvin

Reg. 36859

Patent attorney

Mikhail Lotvin

San Jose, CA · 95170

408-821-3582

Kam C Louie

Reg. 33008

Patent attorney

Ladas and Parry

Los Angeles, CA · 90036

323-934-2300

Michael L Louie

Reg. 36988

Patent attorney

Beyer Law Group LLP

Palo Alto, CA · 94303

650-842-1300

Daniel Louis

Reg. 81914

Patent agent

Los Angeles, CA · 90048

310-912-4003

Richard B Love

Reg. 34659

Patent attorney

Pharmacyclics, Inc.

Sunnyvale, CA · 94085

408-774-3379

Brett A Lovejoy

Reg. 42813

Patent attorney

Morgan, Lewis & Bockius LLP

San Francisco, CA · 94105

415-442-1211

David Eugene Lovejoy

Reg. 22748

Patent attorney

Novato, CA · 94949-8210

415-612-4047

J. Blake Lovelace

Reg. 55405

Patent agent

Encinitas, CA · 92024

760-753-0528

Eric B. Lovell

Reg. 75337

Patent attorney

Dexcom Inc.

San Diego, CA · 92121

858-203-6931

Kristen E. Lovin

Reg. 72821

Patent attorney

NVIDIA Corporation

Santa Clara, CA · 95051

408-486-2000

Jaric E Loving

Reg. 73417

Patent attorney

Innovent Law, PC

Aliso Viejo, CA · 92656

949-429-0212

Michael L Lovitz

Reg. 33953

Patent attorney

Lovitz IP Law PC

West Hollywood, CA · 90069

323-337-9088

Paul A. Lovrich

Reg. 60857

Patent attorney

Campbell, CA · 95011-2214

408-823-4554

Clara C. Low

Reg. 73809

Patent attorney

Lewis Roca Rothgerber, LLP

Menlo Park, CA · 94025

650-687-8421

Scott M. Lowry

Reg. 58832

Patent attorney

Lowry Blixseth APC

Agoura Hills, CA · 91301

818-584-6460

Stuart Orin Lowry

Reg. 26563

Patent attorney

Lowry Blixseth APC

Agoura Hills, CA · 91301

818-584-6460

Karin Elizabeth Loyola

Reg. 35976

Patent attorney

Altadena, CA · 91001

626-375-6490

Christina S Loza

Reg. 56866

Patent attorney

Loza & Loza, LLP

Upland, CA · 91786

714-453-9824

Julio Loza

Reg. 47758

Patent attorney

Loza & Loza, LLP

Upland, CA · 91786

714-453-9824

Vladimir S. Lozan

Reg. 68430

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-721-2828

Dina Lee Lozofsky

Reg. 56563

Patent agent

Encino, CA · 91436

626-456-8090

Bing Lu

Reg. 81277

Patent agent

San Jose, CA · 95158

408-904-9029

Bryce T Lu

Reg. 55406

Patent agent

Tustin, CA · 92980

310-650-4289

Haibo James Lu

Reg. 58518

Patent attorney

San Diego, CA · 92163

619-255-9700

Haw-Minn Lu

Reg. 55407

Patent agent

San Diego, CA · 92126

858-382-7513

Jia-geng Lu

Reg. 68342

Patent attorney

Dechert LLP

Mountain View, CA · 94040

650-813-4872

Lawrence T Lu

Reg. 60372

Patent agent

One Apple Park Way

Cupertino, CA · 95014

408-783-4880

Li Lu

Reg. 83085

Patent agent

San Diego, CA · 92129

484-632-6356

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.