Connecticut

Patent attorneys in Connecticut

Connecticut hosts 752 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 Cantor Colburn LLP, Carmody Torrance Sandak, and United Technologies Research Center.

Top cities in Connecticut

All practitioners in Connecticut

Damian K. Gunningsmith

Reg. 72944

Patent attorney

Carmody Torrance Sandak

New Haven, CT · 06510

203-777-5501

Neal E Guttenberg

Reg. 63457

Patent attorney

Meriden, CT · 06451

203-605-5705

Kristofer L. Haggerty

Reg. 72298

Patent attorney

North Haven, CT · 06473

203-927-7656

Jack E Haken

Reg. 26902

Patent attorney

Danbury, CT · 06811

203-512-0487

Timothy B Hale

Reg. 45766

Patent attorney

Woodbridge, CT · 06525

203-494-7220

David E Hall

Reg. 51172

Patent attorney

United Technologies Research Center

East Hartford, CT · 06108

860-610-7932

Robert McGregor Hallenbeck

Reg. 54148

Patent agent

Stamford, CT · 06902

617-694-6524

Robert James Hampsch

Reg. 36155

Patent attorney

Praxair, Inc

Danbury, CT · 06810

203-837-2178

Anthony H Handal

Reg. 26275

Patent attorney

Handal & Morofsky, LLC

Fairfield, CT · 06825

917-880-0811

Mark F Harrington

Reg. 31686

Patent attorney

McCarter & English, LLP

Hartford, CT · 06103

860-275-6789

Jonathan A Harris

Reg. 44744

Patent attorney

Axinn, Veltrop & Harkrider, LLP

Hartford, CT · 06103-3702

860-275-8115

Alan T. Harrison

Reg. 58933

Patent attorney

Sandollar Law

Milford, CT · 06460

203-212-9996

Christine M Hartmann

Reg. 43177

Patent attorney

West Hartford, CT · 06107

908-391-4218

Thomas Angell Hatfield

Reg. 47637

Patent attorney

Noank, CT · 06340

860-572-7063

Alicia A. Hayter

Reg. 67093

Patent attorney

Cantor Colburn LLP

Hartford, CT · 06103

860-286-2929

Robert P Hayter

Reg. 28424

Patent attorney

Robert Hayter

AVON, CT · 06001

860-614-6597

Andrea L Hemberger

Reg. 83758

Patent attorney

Ohlandt, Greeley & Perle

Stamford, CT · 06901

860-331-6311

Alfred Henry Hemingway· Jr

Reg. 26736

Patent attorney

Stamford, CT · 06902

203-425-9987

Christopher G. Henley

Reg. 80318

Patent agent

Milford, CT · 06460

908-235-2972

Randy George Henley

Reg. 35188

Patent attorney

Otis Elevator Company

Farmington, CT · 06032

860-676-5742

Edward Herbert

Reg. 27135

Patent agent

Canton, CT · 06019

860-693-2204

Nicholas R. Herrel

Reg. 72141

Patent attorney

Cantor Colburn LLP

Hartford, CT · 06103

860-286-2929

Raquel N. Herrera-Soto

Reg. 76160

Patent attorney

New Britain, CT · 06053

860-995-2889

Joseph A Heyison

Reg. 54166

Patent attorney

Stamford, CT · 06902

203-964-9386

Jonathan D Hill

Reg. 69716

Patent agent

Boehringer Ingelheim Pharmaceuticals Inc.

Ridgefield, CT · 06877-0368

203-205-7440

John Chadwick Hilton

Reg. 22965

Patent attorney

McCormick Paulding and Huber

Hartford, CT · 06103

860-549-5290

Tiffini DeAngela Smith Hines

Reg. 73569

Patent attorney

Charter Communications

Stamford, CT · 06902

203-428-0164

Robert Allen Hlavacek

Reg. 32779

Patent agent

Patent Service

Cheshire, CT · 06410

203-651-0276

Nathaniel B. Hobert

Reg. 78866

Patent agent

North Haven, CT · 06473

860-918-6638

Remie Leone Hochman

Reg. 902812

Limited recognition

University of Connecticut School of Law

Hartford, CT · 06105-2290

860-707-9555

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?

752 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.