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 Morgan, Lewis & Bockius LLP, Law Office of Daniel Ballard, and Loop Mobile, Inc..

Top cities in California

All practitioners in California

Stephen Eric Baldwin

Reg. 27769

Patent attorney

San Diego, CA · 92128

858-699-1549

Conor S Ball

Reg. 78072

Patent attorney

Morgan, Lewis & Bockius LLP

San Francisco, CA · 94105-1596

415-442-1668

Daniel N Ballard

Reg. 48918

Patent attorney

Law Office of Daniel Ballard

Carmichael, CA · 95608

916-607-3904

Richard E Ballard

Reg. 46078

Patent attorney

Loop Mobile, Inc.

San Jose, CA · 95113

408-571-9600

Robert J Ballarini

Reg. 48684

Patent agent

Carmel Patent Agency LLC

Carmel, CA · 93923

831-224-9215

Jonathan J. Ballerano

Reg. 71893

Patent agent

Menlo Park, CA · 94025

650-260-4809

Matthew J Balun

Reg. 69608

Patent attorney

Applied Materials, Inc.

Santa Clara, CA · 95054

408-806-1765

Christopher R Balzan

Reg. 40901

Patent attorney

Balzan Intellectual Property Law, PC

Ventura, CA · 93003

805-658-1945

James E Bame

Reg. 44521

Patent attorney

IPLA P.A.

Los Angeles, CA · 90010

213-384-7200

Narinder S Banait

Reg. 43482

Patent attorney

PharmacoFore Inc.

San Carlos, CA · 94070

David J. Bancroft

Reg. 73666

Patent attorney

M.J. Ram & Associates

Bell Canyon, CA · 91307

805-222-3023

Simona L. Bandong

Reg. 68183

Patent attorney

Mendel Biotechnology

Hayward, CA · 94545

510-259-6171

Krishna G Banerjee

Reg. 43317

Patent attorney

Vividion Therapeutics

San Diego, CA · 92121

858-345-4690

Matthew J Banet

Reg. 40902

Patent agent

Triage Data Networks

Del Mar, CA · 92014

619-733-7689

Jason J. Bang

Reg. 73380

Patent attorney

Willkie Farr & Gallagher LLP

Palo Alto, CA · 94025

650-887-9313

Colton E. Bangs

Reg. 83364

Patent agent

My Patent Guys

Healdsburg, CA · 95448

707-710-5926

Scott D Banister

Reg. 71415

Patent agent

El Cajon, CA · 92020

619-203-2388

Ryan T Banks

Reg. 72799

Patent agent

Yorba Linda, CA · 92887

714-745-4254

Anjali A Bansal

Reg. 70244

Patent agent

San Jose, CA · 95129

408-446-2300

Gurtej S Bansal

Reg. 62692

Patent agent

San Diego, CA · 92109

925-719-0222

Monica Bansal

Reg. 62208

Patent attorney

Walsworth. Franklin Bevins & McCall

San Francisco, CA · 94111

415-819-9876

Rekha P Bansal

Reg. 36440

Patent attorney

Principia Biopharma Inc.

South San Francisco, CA · 94080

650-416-7711

Vandana Bansal

Reg. 54979

Patent agent

Foley & Lardner LLP

Palo Alto, CA · 94304

650-856-3700

Catherine J Banti

Reg. 52465

Patent agent

Healdsburg, CA · 95448

707-433-1683

Mingyue Bao

Reg. 800087

Limited recognition

Mintz

Los Angeles, CA · 90067

310-586-3200

Ning Bao

Reg. 62646

Patent agent

Mountain View, CA · 94043

650-860-5168

YuKai Bao

Reg. 79686

Patent agent

Desmarais LLP

San Francisco, CA · 94111

415-573-1822

Zheng Bao

Reg. 56158

Patent attorney

Shearman & Sterling, LLP

Menlo Park, CA · 94025

650-838-3600

James P Barabas

Reg. 46536

Patent attorney

KRAMER ALBERTI LIM & TONKOVICH LLP

Foster City, CA · 94404

650-514-2742

Alexandra J Baran

Reg. 39101

Patent agent

A. J. Baran Consulting. Inc.

MOUNTAIN VIEW, CA · 94040

650-938-3300

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.