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, United Technologies Corp/ Pratt and Whitney, and Yahwak and Assocs.

Top cities in Connecticut

All practitioners in Connecticut

Jiangping Wu

Reg. 56931

Patent agent

Danbury, CT · 06810

203-826-6281

Wanli Wu

Reg. 59045

Patent attorney

Cantor Colburn LLP

Hartford, CT · 06103

860-286-2929

Ying Wu

Reg. 68928

Patent agent

Guilford, CT · 06437

203-453-4611

Jinquan Xu

Reg. 62643

Patent agent

United Technologies Corp/ Pratt and Whitney

East Hartford, CT · 06118

860-565-1343

George M Yahwak

Reg. 26824

Patent attorney

Yahwak and Assocs

Trumbull, CT · 06611

203-268-1951

Guy D Yale

Reg. 29125

Patent attorney

Alix, Yale & Ristas, LLP

Hartford, CT · 06103

860-527-9211

Michael Makoto Yamauchi

Reg. 58468

Patent attorney

Alexion Pharmaceuticals, Inc.

New Haven, CT · 06510

203-699-7334

Weiying Yang

Reg. 61637

Patent attorney

Purdue Pharma L.P.

Stamford, CT · 06901

203-588-7338

Zheng Yang

Reg. 52382

Patent agent

West Redding, CT · 06896

203-544-9438

John Yankovich

Reg. 42240

Patent attorney

Weston, CT · 06883

203-856-1054

George B Ynetema

Reg. 30705

Patent attorney

Bolton, CT · 06043

860-643-9358

Gie W Yoon

Reg. 72417

Patent attorney

RTX Corporation

East Hartford, CT · 06118

860-610-7000

Richard V Zanzalari

Reg. 49032

Patent attorney

Pfizer, Inc. (Corporation)

Groton, CT · 06340

860-715-4546

Cindy M Zelson

Reg. 33467

Patent attorney

Weston, CT · 06883

203-293-4118

Steve Terry Zelson

Reg. 30335

Patent attorney

Pursuit IP Consulting

Waterford, CT · 06385

917-514-2399

Bryan D Zerhusen

Reg. 54566

Patent attorney

Cantor Colburn, LLP

Hartford, CT · 06103

860-286-2929

Dominick A. Zero

Reg. 73176

Patent agent

Hamden, CT · 06517

551-655-7190

Douglas D Zhang

Reg. 37985

Patent attorney

Ziegler IP Law Group, LLC.

Fairfield, CT · 06825

203-659-0388

Lei Zhang

Reg. 72369

Patent agent

Cytec Industries Inc.

Stamford, CT · 06902

203-321-2836

Martin Z. Zhang

Reg. 69058

Patent agent

Oakdale, CT · 06370

Xinyu Zhang

Reg. 83930

Patent agent

New Haven, CT · 06511

203-824-0720

Zhengrong Zhao

Reg. 68074

Patent agent

Quaker Hill, CT · 06375

860-865-0098

Jing Zhou

Reg. 75831

Patent agent

Dilworth, IP

Trumbull, CT · 06611

203-220-8496

Geza C Ziegler· Jr

Reg. 44004

Patent attorney

Ziegler IP Law Group LLC

Westport, CT · 06880

203-659-0388

Jonas S Zikas

Reg. 60580

Patent attorney

UTC Aerospace Systems

Windsor Locks, CT · 06096

860-654-0485

Thea B. Zimnicki

Reg. 71642

Patent attorney

South Windsor, CT · 06074

860-218-0710

Stephen S. Zimowski

Reg. 75294

Patent attorney

St. Onge Steward Johnston & Reens LLC

Stamford, CT · 06905

315-527-1339

Henry T. Zinn

Reg. 83218

Patent agent

Litchfield, CT · 06759

860-329-3549

Oliver A Zitzmann

Reg. 38691

Patent attorney

Redding, CT · 06896

203-938-4834

Enrico Zordan

Reg. 69660

Patent agent

Darien, CT · 06820

203-807-2258

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.