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 Ruggiero McAllister & McMahon LLC, Perman and Green, LLP, and Cantor Colburn LLP.

Top cities in Connecticut

All practitioners in Connecticut

Kevin Thomas Mansfield

Reg. 31635

Patent agent

New Fairfield, CT · 06812

203-746-1961

Janik Marcovici

Reg. 42841

Patent attorney

Perman and Green, LLP

Fairfield, CT · 06824

203-259-1800

Benjamin S. Marcus

Reg. 72255

Patent agent

Cantor Colburn LLP

Hartford, CT · 06103-3207

860-286-2929

Robert Marini

Reg. 60303

Patent attorney

Woodbridge, CT · 06525

860-557-1776

Charles Patrick Martin

Reg. 20909

Patent attorney

Trumbull, CT · 06611

203-378-7504

Stephen A Martin

Reg. 52002

Patent attorney

West Hartford, CT · 06119-1347

812-618-6996

Jacob P Martinez

Reg. 57924

Patent attorney

Pratt & Whitney

East Hartford, CT · 06118

860-830-3734

Kurt Michael Maschoff

Reg. 38235

Patent attorney

Buckley, Maschoff & Talwalkar, LLC

New Canaan, CT · 06840

203-972-0081

Kevin M Mason

Reg. 36597

Patent attorney

Ryan Mason and Lewis, LLP

Westport, CT · 06880

203-255-6560

Seth W Mason

Reg. 63464

Patent agent

Orange, CT · 06477

203-795-4036

Peter J Matthews

Reg. 56819

Patent agent

Hartford, CT · 06105

860-232-4372

Robert J Mauri

Reg. 41180

Patent attorney

McCarter & English, LLP

Hartford, CT · 06103

860-275-6794

Jean B Mauro

Reg. 25638

Patent attorney

North Haven, CT · 06473

203-288-5107

Leslie-Anne Maxwell

Reg. 44778

Patent attorney

Cantor Colburn, LLP

Hartford, CT · 06103

860-286-2929

Douglas M McAllister

Reg. 37886

Patent attorney

Lipsitz & McAllister, LLC

Monroe, CT · 06468

203-459-0200

Robert J McCard

Reg. 53293

Patent attorney

Burlington, CT · 06013

860-673-9491

Christopher L McDavid

Reg. 70809

Patent attorney

LANXESS Corporation

Shelton, CT · 06484

475-235-9022

Robert Sean McDonough

Reg. 37184

Patent attorney

Aetna, AS11

Hartford, CT · 06156

860-273-4860

James G McEwen

Reg. 41983

Patent attorney

Sikorsky Aircraft Corporation

Stratford, CT · 06615-9129

203--38-6-3274

Peter D McFadden

Reg. 80854

Patent attorney

Cantor Colburn

Hartford, CT · 06103

860-286-2929

Brian M McGuire

Reg. 55445

Patent attorney

Ruggiero McAllister & McMahon LLC

Stamford, CT · 06901

203-293-7395

Steven M McHugh

Reg. 47784

Patent attorney

The Law Offices of Steven McHugh, LLC

Middletown, CT · 06457

860-343-9454

James Francis McLaughlin

Reg. 38048

Patent attorney

Shelton, CT · 06484

203-217-7838

Willajeanne F McLean

Reg. 33016

Patent attorney

University Of Connecticut School Of Law

Hartford, CT · 06105

860-570-5280

Edward Lawrence McMahon

Reg. 44927

Patent attorney

Ruggiero McAllister & McMahon LLC

Stamford, CT · 06901

203-293-9140

Kevin C McMahon

Reg. 22423

Patent attorney

New Canaan, CT · 06840

203-594-7820

Stephen P McNamara

Reg. 32745

Patent attorney

St. Onge Steward Johnston & Reens, LLC

Fairfield, CT · 06824-6041

203-324-6155

Scott Alexander McNeil

Reg. 37185

Patent attorney

McCormick, Paulding & Huber PLLC

Hartford, CT · 06103

860-549-5290

Kevin E McVeigh

Reg. 33017

Patent attorney

Clinton, CT · 06413

267-824-7242

Andrew G Melick

Reg. 56868

Patent attorney

Linde Inc

Danbury, CT · 06810

203-837-2148

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.