Delaware

Patent attorneys in Delaware

Delaware hosts 324 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 Delaware. 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 InterDigital Holdings, Inc., Dupont Company, and E. I. DuPont De Nemours and Company.

Top cities in Delaware

All practitioners in Delaware

Xiaobin Ding

Reg. 72168

Patent agent

Dupont Company

Wilmington, DE · 19803

267-968-0490

Bradley N Ditty

Reg. 40994

Patent attorney

InterDigital Holdings, Inc.

Wilmington, DE · 19809-3727

302-281-3653

Kevin S Dobson

Reg. 40296

Patent agent

E. I. DuPont De Nemours and Company

Wilmington, DE · 19805

302-999-6339

Rex A Donnelly

Reg. 41712

Patent attorney

Buchanan Ingersoll & Rooney

Wilmington, DE · 19899

302-778-3460

Kenneth L Dorsney

Reg. 51624

Patent attorney

Morris James LLP

Wilmington, DE · 19801-1494

302-888-6855

Adel J Drake

Reg. 66930

Patent agent

Xsensus, LLP

Vienna, DE · 22182

571-376-6310

Roseanne Raimondo Duffy

Reg. 33869

Patent attorney

E. I. Du Pont de Nemours and CO

Wilmington, DE · 19898

302-773-0686

Huan B Duong

Reg. 69624

Patent attorney

Newark, DE · 19711

302-345-8999

Mark A Edwards

Reg. 39542

Patent attorney

E I Du Pont de Nemours & Company

Wilmington, DE · 19880

302-353-9416

Brian P Egan

Reg. 54866

Patent attorney

Morris, Nichols, Arsht & Tunnell, LLP

Wilmington, DE · 19899-1347

302-351-9454

Ikenna C. Ejimonyeugwo

Reg. 82246

Patent agent

Panitch Schwarze Belisario & Nadel LLP

Wilmington, DE · 19803

302-394-6021

Richard W Ellis

Reg. 46683

Patent attorney

W. L. Gore & Associates, Inc.

Newark, DE · 19711

302-738-4880

Don A Erlandson

Reg. 29148

Patent attorney

New Castle, DE · 19720

302-322-3028

Jenafer Evans

Reg. 58177

Patent attorney

DuPont Specialty Products USA, LLC

Wilmington, DE · 19805

302-290-7126

Vincent L Fabiano

Reg. 31249

Patent attorney

Millsboro, DE · 19966

302-947-9851

Haim M. Factor

Reg. 52877

Patent agent

Ofek Group Inc.

Lewes, DE · 19958-3608

302-200-1424

Tamera L Fair

Reg. 35867

Patent attorney

DuPont

Wilmington, DE · 19805

302-999-4170

S Neil Feltham

Reg. 36506

Patent agent

E. I DuPont de Nemours and Company

Wilmington, DE · 19803

302-695-9360

Blair Q Ferguson

Reg. 34329

Patent attorney

Wilmington, DE · 19806

302-354-3126

Gregory J Feulner

Reg. 41744

Patent attorney

E I Dupont De Nemours and Company

Wilmington, DE · 19805

302-999-4201

Gordon Edward Fish

Reg. 46111

Patent agent

Wilmington, DE · 19808

302-482-2242

Mark E Freeman

Reg. 48143

Patent attorney

Freeman Intellectual Property Law, LLC

Wilmington, DE · 19805

302-304-3837

Jane O. Garrity

Reg. 73018

Patent agent

University of Delaware Office of Economic

Newark, DE · 19711

302-831-0783

Christina Warrick Geerlof

Reg. 45690

Patent attorney

The LYCRA Company

Wilmington, DE · 19808

302-498-9304

Matthew J Gerike

Reg. 50179

Patent agent

Newark, DE · 19711-5161

302-266-0607

John B. Gillick· Jr.

Reg. 63027

Patent attorney

InterDigital Holdings, Inc.

Wilmington, DE · 19809

302-281-3671

Joel W. Glazer

Reg. 76493

Patent attorney

Devlin Law Firm

Wilmington, DE · 19806

440-667-7109

Andrew G Golian

Reg. 25293

Patent attorney

Wilmington, DE · 19803

302-658-5740

Stephen J. Gombita

Reg. 67091

Patent attorney

DuPont de Nemours, Inc.

Wilmington, DE · 19805

302-999-4836

Brian A Gomez

Reg. 44718

Patent attorney

Gomez International Patent Office, LLC

Wilmington, DE · 19806

415-843-1032

Common questions

Do I need a patent attorney based in Delaware?

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 Delaware-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 Delaware?

324 active USPTO-registered patent practitioners list a Delaware 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.