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 E I du Pont de Nemours and Company, E I du Pont de Nemours and CO., and Barnes & Thornburg, LLP.

Top cities in Delaware

All practitioners in Delaware

Barbara V Maurer

Reg. 31278

Patent attorney

Dagsboro, DE · 19939

302-537-5944

Nancy S Mayer

Reg. 29190

Patent attorney

E I du Pont de Nemours and Company

Wilmington, DE · 19805

302-892-0680

Patricia McGee

Reg. 37391

Patent attorney

E I du Pont de Nemours and CO.

Wilmington, DE · 19898

302-773-0149

Daniel F McManus

Reg. 71663

Patent attorney

Lewes, DE · 19958

610-212-5986

Thomas J McWilliams

Reg. 44930

Patent attorney

Barnes & Thornburg, LLP

Wilmington, DE · 19801-1050

302-300-3443

George M Medwick

Reg. 27456

Patent attorney

E I Du Point de Nemours and CO

Wilmington, DE · 19805

302-892-7915

Rakesh H Mehta

Reg. 50224

Patent attorney

Potter Anderson & Corroon LLP

Wilmington, DE · 19899-0951

302-984-6089

Pamela C Meitner

Reg. 28774

Patent attorney

Wilmington, DE · 19803

302-654-2097

William J Merritt

Reg. 38967

Patent attorney

Interdigital Inc.

Wilmington, DE · 19809

302-281-3700

Roger Miao

Reg. 53323

Patent agent

DuPont de Nemours, Inc.

Wilmington, DE · 19880

302-596-6923

Amy L Miller

Reg. 43804

Patent attorney

W.L. Gore & Associates, Inc.

Newark, DE · 19711

302-292-4027

Guy M Miller

Reg. 32333

Patent attorney

Lewes, DE · 19958

302-200-2218

Kenneth G Moloy

Reg. 73793

Patent agent

Hockessin, DE · 19707

302-222-1793

Bruce M Monroe

Reg. 33602

Patent attorney

Wilmington, DE · 19810-3424

302-478-5733

M.P. Moon

Reg. 53844

Patent attorney

Wilmington, DE · 19899

Michael A Moore

Reg. 41203

Patent attorney

Wilmington, DE · 19803

312-615-6783

Eamonn P Morrison

Reg. 55841

Patent attorney

Morrison Law

Wilmington, DE · 19809

302-793-4941

Susan E. Morrison

Reg. 56332

Patent attorney

Fish & Richardson P.C.

Wilmington, DE · 19899-1114

302-778-8434

Bruce William Morrissey

Reg. 30663

Patent attorney

Wilmington, DE · 19803

302-478-3549

Arthur Z Moss

Reg. 41206

Patent agent

The Du Pont Company

Wilmington, DE · 19880-0301

302-695-2360

Joy Mulholland

Reg. 47810

Patent attorney

Ardentown, DE · 19810

Daniel C Mulveny

Reg. 45897

Patent attorney

Wilmington, DE · 19803

302-530-4830

Prasant Muralidhar

Reg. 77419

Patent agent

Newark, DE · 19702

302-494-1538

Dillon T. Murphy

Reg. 79699

Patent agent

Buchanan Ingersoll & Rooney PC

Wilmington, DE · 19801

610-675-6822

Glenn E J Murphy

Reg. 33539

Patent attorney

Buchanan Ingersoll & Rooney

Wilmington, DE · 19801

302-778-3462

Indhu Muthukrishnan

Reg. 62969

Patent agent

Newark, DE · 19702

302-737-4258

Jonathon O Narita

Reg. 53369

Patent agent

E I Du Pont de Nemours and Company

Wilmington, DE · 19880-0353

302-695-3127

Jamie T Nguyen

Reg. 64687

Patent attorney

Interdigital,

Wilmington, DE · 19809

302-281-3600

Stephanie O'Byrne

Reg. 57837

Patent attorney

Shaw Keller LLP

Wilmington, DE · 19801

302-298-0700

Robert Patrick O'Flynn O'Brien

Reg. 35629

Patent attorney

Ashland Inc.

Wilmington, DE · 19808

302-594-6953

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.