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 Knobbe, Martens, Olson & Bear, LLP, Bingham McCutchen, and Atmel Corporation.

Top cities in California

All practitioners in California

Benjamin B. Meredith

Reg. 78143

Patent attorney

Oakland, CA · 94618

561-504-2426

Andrew N Merickel

Reg. 53317

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

415-954-4114

Lisa A Merkadeau

Reg. 33854

Patent attorney

Pleasanton, CA · 94566

925-398-8664

Pamela S Merkadeau

Reg. 53318

Patent attorney

Bingham McCutchen

East Palo Alto, CA · 94304

650-849-4420

Stuart Lowell Merkadeau

Reg. 33262

Patent attorney

South Lake Tahoe, CA · 96150

925-321-3607

Leo Merken

Reg. 41192

Patent attorney

Atmel Corporation

San Jose, CA · 95131

917-572-6597

Philip I Merksamer

Reg. 76858

Patent attorney

Ginkgo Bioworks

Emeryville, CA · 94608

650-248-2723

Rachel O Merrill

Reg. 53319

Patent attorney

San Diego, CA · 92130

619-318-2616

Dion D Messer

Reg. 44938

Patent attorney

Netskope

Santa Clara, CA · 95054

515-689-6364

Razmig H Messerian

Reg. 56983

Patent attorney

Razmig Messerian, Esq.

Upland, CA · 91786

714-453-9824

Zachary Brewster Messick

Reg. 77839

Patent attorney

Morgan, Lewis & Bockius

Costa Mesa, CA · 92626

714-830-0600

Harold Dale Messner

Reg. 20189

Patent agent

Vallejo, CA · 94590

707-577-8709

Steven A Metz

Reg. 68167

Patent agent

Janah & Associates, P.C.

San Francisco, CA · 94107

415-538-1555

Erik M Metzger

Reg. 53320

Patent attorney

Chime Financial

San Francisco, CA · 94111

415-926-3040

Mark A Metzke

Reg. 71797

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-721-5205

Stuart W. Meurer

Reg. 82230

Patent agent

San Diego, CA · 92108

949-293-5598

Bailey A Meyer

Reg. 78270

Patent agent

Perkins Coie LLP

Palo Alto, CA · 94304

650-838-4779

Matthew J. Meyer

Reg. 75249

Patent attorney

Kilpatrick Townsend & Stockton LLP

Menlo Park, CA · 94025

650-614-6414

Paul J Meyer· Jr

Reg. 47791

Patent attorney

Intel Corporation

Santa Clara, CA · 95054

408-765-3291

Samuel C. Meyer

Reg. 84346

Patent attorney

Morrison Foerster

Palo Alto, CA · 94304

650-813-5600

Sheldon Ryan Meyer

Reg. 27660

Patent attorney

Meyer Capital Partners, LLC

San Francisco, CA · 94111-1632

415-362-1546

Stuart P Meyer

Reg. 33426

Patent attorney

Fenwick and West LLP

Mountain View, CA · 94041

650-335-7286

Susan B Meyer

Reg. 48168

Patent agent

Gordon & Rees LLP

San Diego, CA · 92101

619-696-6700

Fernando Meza Gutierrez

Reg. 78680

Patent agent

Bio-Rad Laboratories, Inc.

Hercules, CA · 94547

510-240-8858

Kyle J. Meziere

Reg. 76304

Patent attorney

Escondido, CA · 92027

760-739-1801

Danai N. Mhembere

Reg. 70864

Patent agent

Morgan Lewis & Bockius LLP

San Francisco, CA · 94105

415-442-1506

Zheng Miao

Reg. 75420

Patent agent

Albany, CA · 94706

530-902-9778

Stephen George Mican

Reg. 31983

Patent attorney

West Point, CA · 95255-1347

209-224-4962

Rakesh J Michael

Reg. 68349

Patent attorney

Uber Technologies, Inc.

San Francisco, CA · 94158

000-000-0000

Christopher A Michail

Reg. 66997

Patent agent

Rowland Heights, CA · 91748

626-384-0792

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.