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, Otterstedt, Ellenbogen & Kammer, LLP, and Hartford Healthcare.

Top cities in Connecticut

All practitioners in Connecticut

Jason M Ostrosky

Reg. 61322

Patent attorney

Shelton, CT · 06484

203-929-4502

Paul John Otterstedt

Reg. 37411

Patent attorney

Otterstedt, Ellenbogen & Kammer, LLP

Greenwich, CT · 06830

203-433-3157

Randall L Owen

Reg. 36368

Patent agent

Hartford Healthcare

Willington, CT · 06279

475-434-1183

Salvatore P Pace

Reg. 30206

Patent attorney

Praxair, Inc.

Danbury, CT · 06810

203-837-2034

Anthony M Palazzolo· Jr

Reg. 39323

Patent attorney

The Patent Source

North Stonington, CT · 06359

860-599-8507

Weitao Pan

Reg. 81352

Patent agent

Old Saybrook, CT · 06475

908-240-8747

John M Paoff

Reg. 64535

Patent agent

Manchester, CT · 06042

419-708-1038

Sean E Paquette

Reg. 79613

Patent attorney

The Hartford Steam Boiler Inspection and Insurance Company

Hartford, CT · 06118

860-638-7726

Ankur P Parekh

Reg. 56060

Patent attorney

RTX Corporation

Farmington, CT · 06032

860-221-8604

Chanwook Park

Reg. 70785

Patent agent

Redding, CT · 06896

203-240-4346

Hyun Jong Park

Reg. 59093

Patent attorney

Park & Associates IP Law LLC

Milford, CT · 06461

203-702-7102

Garry E Parzych

Reg. 45812

Patent agent

Southington, CT · 06489

860-620-9080

Jack M Pasquale

Reg. 31052

Patent attorney

Ware Fressola Maguire & Barber LLP

Monroe, CT · 06468

203-261-1234

Kiran Kanti Patel

Reg. 73122

Patent attorney

PHILIPS INTELLECTUAL PROPERTY & STANDARDS

STAMFORD, CT · 06905

267-750-9235

Usha R Patel

Reg. 52101

Patent agent

Boehringer Ingelheim Pharmaceuticals INC

Ridgefield, CT · 06877

203-798-5740

Brian A. Pattengale

Reg. 79614

Patent agent

Wiggin and Dana LLP

New Haven, CT · 06510

203-498-4460

Matthew J Patterson

Reg. 41244

Patent attorney

Optimal IP Strategies

Glastonbury, CT · 06033

860-982-6415

Theodore Roy Paulding

Reg. 19294

Patent agent

Wethersfield, CT · 06109

Claire L. Pearson

Reg. 60480

Patent agent

Newington, CT · 06111

860-665-1512

Daniel A. Pearson

Reg. 58053

Patent agent

Enko Chem

Mystic, CT · 06355

603-714-4097

David R. Pegnataro

Reg. 72051

Patent attorney

DeLio, Peterson and Curcio LLC

New Haven, CT · 06511

203-787-0595

Roberta Louise Pelletier

Reg. 46372

Patent attorney

Cantor Colburn, LLP

Hartford, CT · 96103

860-286-2929

Michele C. Perino

Reg. 66333

Patent attorney

Cantor Colburn, LLP

Hartford, CT · 06103

860-286-2929

Thomas Joseph Perkowski

Reg. 33134

Patent attorney

Thomas J. Perkowski, Esq, P.C.

Darien, CT · 06820

203-357-1950

Peter William Peterson

Reg. 31867

Patent attorney

DeLio & Peterson, LLC

New Haven, CT · 06511

203-787-0595

David Charles Petre

Reg. 23084

Patent attorney

Wilton, CT · 06897

203-962-1591

Michael P Pettit

Reg. 58022

Patent attorney

Michael Pettit, PLLC

Wilton, CT · 06897

914-614-2025

Robert William Pierson· Jr

Reg. 60310

Patent attorney

FuelCell Energy, Inc.

Danbury, CT · 06810

203-825-6074

Daniel T. Piorkowski

Reg. 81601

Patent agent

Fairfield, CT · 06824

203-520-8592

James E Piotrowski

Reg. 43860

Patent attorney

unemployed

none, CT · 00000

000-000-0000

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.