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 Dilworth IP, LLC, Cantor Colburn LLP, and Alexion Pharmaceuticals.

Top cities in Connecticut

All practitioners in Connecticut

Frederick Andrew Spaeth

Reg. 33793

Patent attorney

Dilworth IP, LLC

New Haven, CT · 06513

203-220-8496

David T. Spalding

Reg. 78126

Patent attorney

Newington, CT · 06111

860-308-0548

Todd Nicholas Spalding

Reg. 55638

Patent agent

Alexion Pharmaceuticals

New Haven, CT · 06510

475-230-3372

Anthony J Spath

Reg. 63478

Patent agent

West Hartford, CT · 06119

814-360-5108

David J Speranzini

Reg. 66439

Patent attorney

Woodbridge, CT · 06525

203-389-1842

Nicholas R Stango

Reg. 73750

Patent attorney

Cantor Colburn LLP

Hartford, CT · 06103-3207

860-286-2929

Jackson E Stanland

Reg. 24444

Patent agent

Farmington, CT · 06032

860-409-0634

Lloyd P Stauder

Reg. 20999

Patent attorney

L P Stauder Consulting

Trumbull, CT · 06611

203-268-3001

Jonathan D Staudt

Reg. 79957

Patent attorney

Cantor Colburn LLP

Hartford, CT · 06103

860-286-2929

Darryl C Stein

Reg. 46219

Patent agent

Andover, CT · 06232

860-742-3180

Mark Steinberg

Reg. 40829

Patent attorney

RC Trademark Company, LLC

New Milford, CT · 06776

860-368-0040

Alan Ross Stempel

Reg. 28991

Patent attorney

Boehringer Ingelheim Corp.

Ridgefield, CT · 06877

203-798-4868

Linda M Stephens Stramiello

Reg. 65057

Patent attorney

Arvinas, Inc.

New Haven, CT · 06511

475-284-5721

Gregory Ralph Stephenson

Reg. 44356

Patent attorney

RTX Corporation

East Hartford, CT · 06108

860-593-0668

Samantha Kate Sterenberg

Reg. 902814

Limited recognition

University of Connecticut School of Law

Hartford, CT · 06105-2290

443-462-1601

Alan L Stern

Reg. 59071

Patent agent

Harrington & Smith, LLP

Shelton, CT · 06484

203-925-9400 X 18

Cecilia Zhang Stiber

Reg. 57818

Patent attorney

Day Pitney LLP

Stamford, CT · 06901

203-977-7300

Kevin L. Strobel

Reg. 59190

Patent agent

Fairfield, CT · 06824

203-372-9569

R Neil Sudol

Reg. 31669

Patent attorney

COSUD Intellectual Property Soulutions, P.C.

Bridgeport, CT · 06605-1601

203-366-3560

Brian R Suffredini

Reg. 40190

Patent attorney

United Technologies Corporation

Farmington, CT · 06032

860-728-7843

Joseph C Suhadolnik

Reg. 56880

Patent agent

Dilworth IP, LLC

Trumbull, CT · 06611

203-220-8496

Michael G Sullivan

Reg. 35377

Patent attorney

Sullivan IP Law

Westport, CT · 06880

202-674-4900

Subhashree Gopalan Sunder

Reg. 54669

Patent agent

Fairfield, CT · 06824

203-259-4681

Nandu A Talwalkar

Reg. 41339

Patent attorney

Buckley, Maschoff & Talwalkar LLC

New Canaan, CT · 06840

203-972-0049

Jeanne M Tanner

Reg. 45156

Patent attorney

McCormick, Paulding & Huber LLP

Hartford, CT · 06103

860-549-5290

Chevaun H. A. Tarrach

Reg. 71560

Patent agent

Weston, CT · 06883

917-592-1858

Madeleine E. Tavcar

Reg. 76532

Patent attorney

Wiggin and Dana LLP

Stamford, CT · 06901

203-363-7638

Bruce William Tedeschi

Reg. 56881

Patent attorney

Rakosky, Haviland & Tedeschi, PC

New London, CT · 06320

860-442-4315

Todd Testerman

Reg. 82509

Patent agent

Wethersfield, CT · 06109

860-906-7560

Vinay V. Thakur

Reg. 79483

Patent attorney

University of Connecticut

Farmington, CT · 06030

860-486-6938

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.