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 FMC Corporation, Siemens Healthcare Diagnostics, and Panitch Schwarze Belisario & Nadel LLP.

Top cities in Delaware

All practitioners in Delaware

Andrea T Slater

Reg. 54455

Patent agent

Siemens Healthcare Diagnostics

Newark, DE · 19714

302-631-6354

Stephany Gale Small

Reg. 69532

Patent agent

Panitch Schwarze Belisario & Nadel LLP

Wilmington, DE · 19803

302-394-6010

Ying Song

Reg. 54460

Patent agent

DuPont Crop Protection

Newark, DE · 19714

302-451-4640

Gerard M Spadaccini

Reg. 48184

Patent attorney

Wilmington, DE · 19803

302-477-0184

Andrew W Spicer

Reg. 57420

Patent attorney

InterDigital Holdings, Inc.

Wilmington, DE · 19809

302-281-3721

Gary R Spritz

Reg. 53630

Patent attorney

Wilmington, DE · 19803

302-655-0900

Monte T. Squire

Reg. 80123

Patent attorney

Duane Morris

Wilmington, DE · 19801-1160

302-229-3813

Stamatios Stamoulis

Reg. 47960

Patent attorney

Stamoulis & Weinblatt LLC

Wilmington, DE · 19809

302-999-1540

Charlene Gross Sternberg

Reg. 66664

Patent agent

FMC Corporation

Newark, DE · 19711

302-366-5916

Thomas A Stevens

Reg. 52256

Patent attorney

AstraZeneca Pharmaceuticals LP

Wilmington, DE · 19850

302-885-5457

Johan M Stoop

Reg. 61723

Patent agent

IFF

Wilmington, DE · 19803

302-999-3582

Chad S C Stover

Reg. 54471

Patent attorney

Barnes & Thornburg LLP

Wilmington, DE · 19801

302-300-3434

Frederick D Strickland

Reg. 39041

Patent attorney

E I du Pont de Nemours and Company

Wilmington, DE · 19805

302-999-6395

Adam L Stroud

Reg. 48410

Patent attorney

Tyco Electronics

Wilmington, DE · 19808

302-633-2750

Stephen Stahl Strunck

Reg. 28672

Patent attorney

Dagsboro, DE · 19939

302-732-9592

Evan D. Szarenski

Reg. 83815

Patent agent

Wilmington, DE · 19807

248-770-1753

Daniel A. Taylor

Reg. 69486

Patent attorney

Smith, Katzenstein & Jenkins LLP

Wilmington, DE · 19801

302-504-1681

Morgan M. Taylor

Reg. 58701

Patent attorney

Morris Nichols Arsht & Tunnell

Wilimington, DE · 19899-1347

302-351-9168

Wilkin Evans Thomas· Jr

Reg. 25053

Patent attorney

Wilmington, DE · 19807

302-656-4991

Frank P Tise

Reg. 50379

Patent agent

Ratner Prestia

Wilmington, DE · 19899

302-778-2500

Edwin Tocker

Reg. 20341

Patent attorney

E.I. duPont de Nemours and Company

Wilmington, DE · 19880-0711

302-999-3076

Alexander T. Toney

Reg. 80206

Patent attorney

Wilmington, DE · 19895

302-573-5874

David Andrew Travis

Reg. 78790

Patent agent

FMC Corporation

Newark, DE · 19711

443-907-8584

Robert M Trepp

Reg. 25933

Patent attorney

Robert M Trepp

MILLSBORO, DE · 19966

845-612-1084

Nancy Lynn Tucker

Reg. 56462

Patent agent

The Chemours Company

Wilmington, DE · 19801

302-773-4486

S Maynard Turk

Reg. 27703

Patent attorney

Stewart and Assocs

Wilmington, DE · 19801

302-652-5200

Anna Martina L. Tyreus

Reg. 58916

Patent attorney

Fish & Richardson P.C.

Wilmington, DE · 19801

302-778-8471

Lisa Burgin Vaccarelli

Reg. 52470

Patent attorney

Tyco Technology Resources

Wilmington, DE · 19808

302-633-2766

Steven J Vollmer

Reg. 52329

Patent agent

E I Du Pont de Nemours and CO

Wilmington, DE · 19898

302-992-2564

Daniel J Vrencur

Reg. 34454

Patent agent

Lewes, DE · 19958

302-645-5280

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.