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 The Chemours Company, SpI Pharma,Inc, and Fish & Richardson, P.C..

Top cities in Delaware

All practitioners in Delaware

Apperson H Johnson

Reg. 65489

Patent agent

Wilmington, DE · 19803

302-478-8020

William B Johnson

Reg. 53080

Patent agent

Newark, DE · 19711

302-547-2385

Camille Jolly-Tornetta

Reg. 48592

Patent agent

SpI Pharma,Inc

Wilmington, DE · 19809

302-576-8600

Vidhu B. Joshi

Reg. 83268

Patent agent

Fish & Richardson, P.C.

Wilmington, DE · 19801

302-652-5070

Jaya M Josyula

Reg. 69594

Patent agent

Self

Wilmington, DE · 19803

610-883-9034

Konrad Helmut Kaeding

Reg. 32035

Patent attorney

E I DuPont De Newmours and Company

Wilmington, DE · 19805

302-999-4206

Robert John Kapalka

Reg. 34198

Patent attorney

The Whitaker LLC

Wilmington, DE · 19808

302-633-2771

Karin Johnson Karel

Reg. 33918

Patent agent

E.I. du Pont de Nemours INC

Wilmington, DE · 19880

302-695-4641

Karen E Keller

Reg. 57487

Patent attorney

Shaw Keller LLP

Wilmington, DE · 19899

302-476-2050

Albert Thomas Keyack

Reg. 32906

Patent attorney

Albert T Keyack

Frankford, DE · 19945

571-529-3532

Karen Kay King

Reg. 34850

Patent attorney

E. I. Du Pont de Nemours and CO

Wilmington, DE · 19898

302-892-7229

Donald R Kinsley

Reg. 53134

Patent attorney

Marion Marvel Bradley & Anderson, P.A.

Wilmington, DE · 19801

302-425-5177

George Edward Kirvan· Jr

Reg. 36187

Patent agent

Wilmington, DE · 19808

302-999-8386

Gerald Keiji Kita

Reg. 24125

Patent attorney

Wilmington, DE · 19808-4308

302-233-6721

Steven E. Kleiner

Reg. 61151

Patent attorney

Wilmington, DE · 19810

302-635-0775

Joan Taft Kluger

Reg. 38940

Patent attorney

Barnes & Thornburg LLP

Wilmington, DE · 19801-1611

302-300-3468

Charles Stuart Knothe

Reg. 29661

Patent attorney

Wilmington, DE · 19810

302-478-8800

Robert K Kobos

Reg. 54229

Patent agent

Wilmington, DE · 19810

302-475-4489

Dana Marie Kolesar

Reg. 55338

Patent attorney

The Chemours Company

Wilmington, DE · 19801

302-773-0156

Karen Haggerty Kondrad

Reg. 38212

Patent attorney

Kondrad Consulting Group LLC

Hockessin, DE · 19707

302-345-1595

Maria M Kourtakis

Reg. 41126

Patent attorney

TrustPoint.One

Wilmington, DE · 19805

302-596-6866

Thomas H. Kramer

Reg. 71042

Patent attorney

O'Kelly Ernst & Joyce, LLC

Wilmington, DE · 19801

302-426-2136

Basil S Krikelis

Reg. 41129

Patent attorney

McCarter & English, LLP

Wilmington, DE · 19801

302-984-6393

Timothy R Krogh

Reg. 40688

Patent attorney

The Chemours Company

Wilmington, DE · 19801

302-571-2697

James M Kron

Reg. 44194

Patent attorney

Potter Anderson and Corroon, LLP

Wilmington, DE · 19801

302-984-6115

Joshua E Lahijani

Reg. 80766

Patent attorney

Wilmington, DE · 19803

302-887-6198

Johnny Lam

Reg. 66279

Patent attorney

Wilmington, DE · 19804

415-799-9979

M. Curtis Lambert

Reg. 57901

Patent attorney

Drinker Biddle & Rath LLP

Wilmington, DE · 19801

302-467-4200

John H Lamming

Reg. 34857

Patent attorney

JOHN H . LAMMING

Hockessin, DE · 19707

302-384-2373

Thomas R Lane

Reg. 42781

Patent attorney

Skadden Arps Slate Meagher and Flom, LLP

Wilmington, DE · 19801

302-651-3186

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.