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 Neopost USA Inc., Quinnipiac University School of Law, and Medtronic.

Top cities in Connecticut

All practitioners in Connecticut

John L Capone

Reg. 41656

Patent attorney

Neopost USA Inc.

Milford, CT · 06461

203-301-3418

Curtis W Carlson

Reg. 18632

Patent attorney

Redding, CT · 06896

203-544-8888

Dale Lynn Carlson

Reg. 28784

Patent attorney

Quinnipiac University School of Law

Hamden, CT · 06518-1908

203-582-3225

Gisela M Carlson

Reg. 47562

Patent agent

West Hartford, CT · 06117

860-938-2638

Alicia J Carroll

Reg. 70068

Patent attorney

Medtronic

North Haven, CT · 06473

203-492-5000

John Anthony Caruso

Reg. 26849

Patent attorney

Fairfield, CT · 06825

203-803-6693

Joseph Richard Carvalko· Jr

Reg. 29779

Patent attorney

Shelton, CT · 06484

203-470-6154

Donald Conyngham Caulfield

Reg. 25191

Patent attorney

Westport, CT · 06880

203-226-0324

Dennis P Cawley

Reg. 44598

Patent attorney

Hamilton Sundstrand

Windsor Locks, CT · 06096-1010

860-654-9158

Mario G Ceste

Reg. 44068

Patent attorney

Law Offices of Mario G. Ceste

Wallingford, CT · 06492

203-678-6418

Roy L Chan

Reg. 51542

Patent attorney

Roy L. Chan, A Professional Law Corporation

Brookfield, CT · 06804-1622

646-645-5481

Michael J Chang

Reg. 46611

Patent attorney

Michael J. Chang, LLC

Milford, CT · 06460

203-877-7961

Sean Chao

Reg. 58292

Patent attorney

MC Credit Partners LP

Stamford, CT · 06902

203-989-9700

Margaret Chappuis

Reg. 45735

Patent agent

New Milford, CT · 06776

860-354-3773

Jay Lionel Chaskin

Reg. 24030

Patent attorney

Cantor Colburn LLP

Hartford, CT · 06103-3207

860-286-2929

David Chen

Reg. 46613

Patent attorney

IP ATTORNEYS GROUP, LLP

Milford, CT · 06460

203-298-4830

Hou Chen

Reg. 66811

Patent agent

Salem, CT · 06420

860-889-8023

Simone Chen

Reg. 69465

Patent attorney

MUNCY, GEISSLER, OLDS & LOWE, P.C.

Weatogue, CT · 06089

703-470-5555

Kent H Cheng

Reg. 33849

Patent attorney

VLP Law Group LLP

Cos Cob, CT · 06807

203-806-4700

Jerrie L Chiu

Reg. 41670

Patent attorney

Guilford, CT · 06437

203-499-9624

Dave S Christensen

Reg. 40955

Patent attorney

McCarter & English LLP

Hartford, CT · 06103

860-275-6709

Eunhye Chu

Reg. 800086

Limited recognition

Canter Colburn LLP

Hartford, CT · 06103

860-286-2929

Thomas E Ciesco

Reg. 59801

Patent agent

DeLio & Peterson, LLC

New Haven, CT · 06511

203-787-0595

Timothy S. Cieslak

Reg. 71707

Patent agent

S. Glastonbury, CT · 06073

860-918-5038

Lianna Lynne Cleland

Reg. 35563

Patent attorney

Kent, CT · 06757

860-592-0273

Thelma A Chen Cleland

Reg. 40948

Patent agent

Mannkind Corp.

Danbury, CT · 06810

203-790-2514

Peggy A Climenson

Reg. 34306

Patent attorney

Westport, CT · 06880

203-226-2259

Michael T Clorite

Reg. 44620

Patent attorney

Hamden, CT · 06518

203-239-9339

David C Coffin

Reg. 57908

Patent agent

Milford, CT · 06460

203-882-2489

Richard J Colangelo· Jr

Reg. 36486

Patent attorney

States Attorneys Office

Stamford, CT · 06905

203-965-5215

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.