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 Drinker Biddle & Reath LLP, O'Rourke Law Office, LLC, and Tyco Technology Resources.

Top cities in Delaware

All practitioners in Delaware

Gerard M O'Rourke

Reg. 39794

Patent attorney

O'Rourke Law Office, LLC

Wilmington, DE · 19801-1186

484-770-8046

Brian C Oakes

Reg. 41467

Patent attorney

Tyco Technology Resources

Wilmington, DE · 19808

302-633-2770

Robert M Oakes

Reg. 62189

Patent attorney

Fish & Richardson P.C.

Wilmington, DE · 19899-1114

302-778-8477

Joan T Odell

Reg. 56870

Patent agent

DuPont Company

Wilmington, DE · 19880-0301

302-695-7030

Emil M Orozco· Jr

Reg. 50823

Patent agent

DuPont Agriculture & Nutrition

Wilmington, DE · 19880-0353

302-695-3121

Charlotte R Otto

Reg. 33987

Patent agent

E.I. DuPont

Wilmington, DE · 19805

302-999-2509

Michelle Marie Ovanesian

Reg. 77028

Patent agent

Young, Conaway, Stargatt & Taylor

Wilmington, DE · 19801

302-407-1429

Kelly Anne Palaisa

Reg. 61888

Patent agent

Wilmington, DE · 19805

302-999-3694

Bindu A. G. Palapura

Reg. 70701

Patent attorney

Potter, Anderson & Corroon LLP

Wilmington, DE · 19899

302-984-6092

Dawn L Palmer

Reg. 41238

Patent attorney

Tyco Electronics Corporation

Wilmington, DE · 19808

302-633-2772

Keith W Palmer

Reg. 53427

Patent agent

The Chemours Company

Wilmington, DE · 19801

302-773-4576

Thomas L Pappenhagen

Reg. 40118

Patent agent

DuPont

Newark, DE · 18711

302-451-5806

Donald F Parsons· Jr

Reg. 31991

Patent attorney

Retired

Wilmington, DE · 19803

302-598-0765

Laurence T Pearson

Reg. 53446

Patent agent

E I Dupont De Nemours and Copmany

Wilmington, DE · 19805

302-999-4219

Thomas William Perkins

Reg. 33027

Patent attorney

Young & Thompson

Rehobeth Beach, DE · 19971

302-227-2527

Carol R Perrotto

Reg. 41247

Patent agent

E I Du Pont de Nemours and Co, Inc.

Wilmington, DE · 19880

302-695-3590

Ashley I Pezzner

Reg. 35646

Patent attorney

Drinker Biddle & Reath LLP

Wilmington, DE · 19801

302-467-4200

Harold Pezzner

Reg. 22112

Patent attorney

Drinker Biddle & Reath LLP

Wilmington, DE · 19801

302-467-4200

Irene Greenwald Plotzker

Reg. 52127

Patent agent

E I Du Pont de Nemours and CO INC

Wilmington, DE · 19880-0301

302-695-3873

Pamela DeMarois Politis

Reg. 47865

Patent attorney

Incyte Corporation

Wilmington, DE · 19803

302-498-5775

Maria C. Pollick

Reg. 51721

Patent agent

Clariant Produkte (Deutschland) GmbH

Frankfurt, DE · 65926

496-930- 522430

Surinder S Punia

Reg. 60045

Patent agent

CovationBiomaterials LLC

Newark, DE · 19713

302-660-6006

Alyssa M. Radovanovich

Reg. 81103

Patent attorney

Hockessin, DE · 19707

443-718-1050

Terry N Rahmeier

Reg. 55558

Patent agent

Wilmington, DE · 19807

302-998-3320

Thatcher A Rahmeier

Reg. 65734

Patent attorney

Drinker Biddle & Reath LLP

Wilmington, DE · 19801

302-467-4200

Jeffrey R Ramberg

Reg. 34700

Patent attorney

Law Office Of Jeffrey R Ramberg

Newark, DE · 19711

302-454-6414

Brad C Rametta

Reg. 54387

Patent attorney

TE Connectivity Corporation

Wilmington, DE · 19808

302-633-2740

Anthony D. Raucci

Reg. 66829

Patent attorney

Morris, Nichols, Arsht & Tunnell LLP

Wilmington, DE · 19899-1347

302-351-9392

Janet E Reed

Reg. 36252

Patent attorney

Potter Anderson & Corroon LLP

Wilmington, DE · 19801

302-984-6044

Stephen E Reynolds

Reg. 37580

Patent agent

E.I. DuPont & Co., Inc.

Wilmington, DE · 19805

302-999-5727

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.