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 DuPont, Stamoulis & Weinblatt, and Incyte Corporation.

Top cities in Delaware

All practitioners in Delaware

Shekhar Vyas

Reg. 46166

Patent agent

Stamoulis & Weinblatt

Wilmington, DE · 19809

302-999-1540 X3

P Michael Walker

Reg. 32602

Patent attorney

Wilmington, DE · 19808

302- 29-0 1275

Patrick A Walker· III

Reg. 58734

Patent attorney

Incyte Corporation

Wilmington, DE · 19803

302-498-6700

Keith A Walter

Reg. 55710

Patent attorney

GOLO, LLC

Newark, DE · 19713

302-455-2438

Jin Wang

Reg. 67826

Patent agent

InterDigital Holdings, Inc.

Wilmington, DE · 19809-3727

302-281-3663

Manxue Wang

Reg. 62098

Patent agent

DuPont

Wilmington, DE · 19805

302-999-4850

Pingping Wang

Reg. 83385

Patent agent

Fish & Richardson P.C.

Wilmington, DE · 19899

302-652-5070

Thomas R Weber

Reg. 41547

Patent agent

E I DuPont De Nemours and Company

Wilmington, DE · 19805

302-999-2631

Richard Charles Weinblatt

Reg. 45500

Patent attorney

Stamoulis & Weinblatt LLC

Wilmington, DE · 19801

302-999-1540

Alexander P. Wharton

Reg. 81030

Patent attorney

Womble Bond Dickinson (US) LLP

Wilmington, DE · 19801

302-252-4336

Allan M Wheatcraft

Reg. 36307

Patent attorney

WL Gore and Associates Inc.

Newark, DE · 19714

928-864-4601

Robert W Whetzel

Reg. 31679

Patent attorney

Richards Layton and Finger

Wilmington, DE · 19899

302-651-7634

Jeffrey P Wikstrom

Reg. 69053

Patent agent

Wilmington, DE · 19806

617-515-0756

Jeanne M. Wilson

Reg. 72432

Patent agent

DuPont

Wilmington, DE · 19805

302-695-1581

Louis G Xiarhos

Reg. 24359

Patent attorney

Harrington, DE · 19952

302-398-8331

Gang G Xu

Reg. 50340

Patent agent

Wilmington, DE · 19803

302-469-0898

Simon L Xu

Reg. 63584

Patent agent

E.I. DuPont de Nemours & Co.

Wilmington, DE · 19805

302-999-3133

Wei-Wen Yang

Reg. 50388

Patent agent

DuPont

Wilmington, DE · 19880

302-695-2325

Fengji Yeh

Reg. 50874

Patent agent

Wilmington, DE · 19808

302-369-2581

Jennifer O Ying

Reg. 58385

Patent attorney

Morris Nichols Arsht & Tunnell LLP

Wilmington, DE · 19899-1347

302-351-9243

Bradley J Yops

Reg. 61608

Patent attorney

University of Delaware

Newark, DE · 19716

302-831-0147

Geoffrey A Zelley

Reg. 66802

Patent attorney

Drinker Biddle & Reath LLP

Wilmington, DE · 19801

302-467-4200

Cheng Zhang

Reg. 65707

Patent agent

Newark, DE · 19711

206-355-8362

Hanxing Zheng

Reg. 53828

Patent attorney

International Flavors & Fragrances, Inc.

Wilmington, DE · 19803

302-999-6371

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.