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 Incyte Corporation, InterDigital Holdings Inc., and Chemours FC LLC.

Top cities in Delaware

All practitioners in Delaware

Scott K Larsen

Reg. 38532

Patent attorney

Incyte Corporation

Wilmington, DE · 19803

302-498-7051

Douglas R Leach

Reg. 53187

Patent agent

Chemours FC LLC

Wilmington, DE · 19801

302-773-3160

Michael U Lee

Reg. 35240

Patent attorney

Michael Lee

Ocean View, DE · 19970

973-462-2572

Sheng-Lian O Lee

Reg. 60299

Patent agent

Wilmington, DE · 19803

302-887-9729

Brian R Lemon

Reg. 63769

Patent attorney

McCarter & English, LLP

Wilmington, DE · 19801

302-984-6374

James M Lennon

Reg. 56815

Patent attorney

Devlin Law Firm LLC

Wilmington, DE · 19806

302-449-7676

Bart Eran Lerman

Reg. 31897

Patent attorney

Kuraray America, Inc.

Wilmington, DE · 19803

847-769-6486

Renee M. Lett

Reg. 65616

Patent agent

Incyte Corporation

Willmington, DE · 19803

302-498-5875

Marissa A. Levenkron

Reg. 83917

Patent agent

Middletown, DE · 19709

215-582-9910

Jeffrey C Lew

Reg. 35935

Patent attorney

Wilmington, DE · 19810

302-475-7919

Carol A. Lewis White

Reg. 33306

Patent attorney

W L Gore and Assocs INC

Newark, DE · 19714

302-738-4880

Christine M Lhulier

Reg. 54269

Patent attorney

E.I. DuPont De Nemours and Company

Wilmington, DE · 19805

302-992-5463

Qun Li

Reg. 77505

Patent agent

Newark, DE · 19711

302-442-2782

Tong Li

Reg. 47748

Patent agent

E. I. duPont de Nemours and Company

Wilmington, DE · 19880-0323

302-695-2550

Xu Li

Reg. 75127

Patent agent

Wilmington, DE · 19707

302-778-8470

Francis M Linguiti

Reg. 32424

Patent attorney

InterDigital Holdings Inc.

Wilmington, DE · 19809-3727

302-281-3676

Ernest C Linsay

Reg. 51953

Patent agent

Hockessin, DE · 19707

302-239-7702

Kangping K Loewenstein

Reg. 41161

Patent attorney

Tyco Electronics Corporation

Wilmington, DE · 19808

302-633-2764

Zhun Lu

Reg. 53242

Patent attorney

Rimon P.C.

Newark, DE · 19713

302-688-7566

David Mercur Lukoff

Reg. 30870

Patent attorney

Wilmington, DE · 19801

302-468-5033

Ava E. Lutz

Reg. 79309

Patent attorney

Panitch Schwarze Belisario & Nadel, LLP

Wilmington, DE · 19803

302-394-6022

Marie Hagarty MacNichol

Reg. 35941

Patent attorney

InterDigital Holdings Inc.

Wilmington, DE · 19809

302-281-3705

Roberte M D Makowski

Reg. 55421

Patent attorney

Connolly Gallagher LLP

Wilmington, DE · 19801

302-757-7300

Andrea V Malinowski

Reg. 33012

Patent attorney

DuPont Legal

Wilmington, DE · 19898

302-774-6443

Daniel M Maloney

Reg. 43771

Patent attorney

E.I. du Pont de Nemours and Company

Wilmington, DE · 19805

302-892-5529

Glenn C Mandalas

Reg. 53263

Patent attorney

Baird Mandalas, LLC

Dover, DE · 19901

302-677-0061

Leland R. Marcus

Reg. 81814

Patent attorney

Wilmington, DE · 19806

302-449-9010

Todd Edward Marlette

Reg. 35269

Patent attorney

LEWES, DE · 19958-5727

703-231-6600

Joshua W Martin· III

Reg. 28324

Patent attorney

Potter Anderson & Corroon LLP

Wilmington, DE · 19899-0951

302-984-6010

Roland E Martin· Jr

Reg. 48082

Patent attorney

Rehoboth Beach, DE · 19971

301-261-6270

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.