Connecticut

Patent attorneys in Connecticut

Connecticut hosts 744 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 Connecticut. 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 Melissa A Tharp, Attorney at Law, General Electric Company, and Day Pitney LLP.

Top cities in Connecticut

All practitioners in Connecticut

Melissa A. Tharp

Reg. 76484

Patent attorney

Melissa A Tharp, Attorney at Law

Danbury, CT · 06810

248-882-8388

Raymond D Thompson

Reg. 30695

Patent attorney

Old Lyme, CT · 06371

Andrew Thurkauf

Reg. 58875

Patent agent

Ridgefield, CT · 06877

203-796-0691

Frances Tischler

Reg. 84623

Patent agent

Stamford, CT · 06903

203-249-2758

Catherine J. Toppin

Reg. 63984

Patent attorney

General Electric Company

Norwalk, CT · 06851

230-229-3904

Steven T Trinker

Reg. 28274

Patent attorney

Ridgefield, CT · 06877

203-778-3078

Jonathan B Tropp

Reg. 50578

Patent attorney

Day Pitney LLP

New Haven, CT · 06510

203-977-7337

Alexander P Tsarouhas

Reg. 55817

Patent attorney

Hamilton Sundstrand Corporation, A United Technologies Aerospace Systems Co

Windsor Locks, CT · 06096

860-654-6000

Richard J Twilley

Reg. 63359

Patent attorney

Athorus, PLLC

Hartford, CT · 06123-0222

860-552-2066

Autumn Ai-Wah Twillie

Reg. 902815

Limited recognition

University of Connecticut School of Law

Hartford, CT · 06105-2290

860-881-4205

Marian Underweiser

Reg. 46134

Patent attorney

Fairfield, CT · 06824

000-000-0000

Ethan J Ung

Reg. 62603

Patent attorney

Halloran Sage LLP

New Haven, CT · 06417

203-672-5432

Carlos M Valente

Reg. 73171

Patent agent

UTC Aerospace Systems

Windsor Locks, CT · 06096

860-654-2840

Eric F Van Ausdal

Reg. 68719

Patent agent

Redding, CT · 06896

845-702-8399

Glenn J Van Moffaert

Reg. 44384

Patent attorney

Legal Advisors of Western Connecticut, LLC

Bethel, CT · 06801

203-730-9775

Peter H Van Winkle

Reg. 36039

Patent attorney

Waypoint IP Law

Fairfield, CT · 06824

914-393-2093

Michael G Varon

Reg. 70586

Patent attorney

Cantor Colburn LLP

Hartford, CT · 06103-3207

404-607-9991

Vincent J Vasta· Jr

Reg. 26655

Patent attorney

Law Offices of VINCENT J VASTA JR

New Canaan, CT · 06840-0494

917-453-7574

Neil A. Vaz

Reg. 74821

Patent attorney

Ruggiero McAllister & McMahon LLC

Stamford, CT · 06901

347-723-1905

James D Veltrop

Reg. 40857

Patent attorney

Axinn, Veltrop and Harkrider LLP

Hartford, CT · 06103

860-275-8150

Joann L Villamizar

Reg. 30598

Patent attorney

Villamizar & Associates IP, LLC

Ridding, CT · 06896

203-938-2060

Alberta A Vitale

Reg. 41520

Patent attorney

East Haven, CT · 06512

203-469-8097

Stephen James Vitola

Reg. 48014

Patent attorney

Trumbull, CT · 06611

Izick Vizel

Reg. 77208

Patent attorney

Stamford, CT · 06902

347-420-0702

Warren K Volles

Reg. 33810

Patent attorney

IPraxus Legal, LLC

Lyme, CT · 06371

860-434-4654

Tatyana Voloshchuk

Reg. 63675

Patent agent

St. Onge Steward Johnston & Reens, LLC

Stamford, CT · 06905

203-324-6155

Marvin R Wachs

Reg. 58227

Patent agent

Withers Bergman LLP

Greenwich, CT · 06870

203-328-2227

Aryn D Wadadli

Reg. 52796

Patent attorney

United States Surgical, a Division of TYCO

Norwalk, CT · 06856

203-845-1000

George F Walker

Reg. 82484

Patent agent

Southbury, CT · 06488

203-560-0660

Nathaniel T Wallace

Reg. 48909

Patent attorney

Otterstedt & Kammer PLLC

Greenwich, CT · 06830

203-219-4861

Common questions

Do I need a patent attorney based in Connecticut?

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 Connecticut-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 Connecticut?

744 active USPTO-registered patent practitioners list a Connecticut 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.