Pennsylvania

Patent attorneys in Pennsylvania

Pennsylvania hosts 1,920 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 Pennsylvania. 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, Dann Dorfman Herrell and Skillman, P.C., and Howson & Howson LLP.

Top cities in Pennsylvania

All practitioners in Pennsylvania

Laura A Donnelly

Reg. 38435

Patent agent

FMC Corporation

Philadelphia, PA · 19104

215-299-6135

John P Donohue· Jr

Reg. 29916

Patent attorney

Phoenixville, PA · 19460

610-613-4930

Melissa D. Doogan

Reg. 63025

Patent attorney

East Fallowfield, PA · 19320

Delaney L. Doran

Reg. 83098

Patent agent

Spring City, PA · 19475

215-688-0425

John C Dorfman

Reg. 16703

Patent attorney

Dann Dorfman Herrell and Skillman, P.C.

Philadelphia, PA · 19103-2307

215-563-4100

Oleksandra Dorosheva

Reg. 82244

Patent attorney

Howson & Howson LLP

Blue Bell, PA · 19422

215-540-9201

James E Doty

Reg. 75033

Patent agent

GE Water and Process Technologies

Trevose, PA · 19053-6742

908-230-3639

Charles H Dougherty· Jr

Reg. 42494

Patent attorney

Carnegie Mellon University

Pittsburgh, PA · 15213

412-268-6263

Danielle L. Dougherty

Reg. 64440

Patent agent

Ottsville, PA · 18942

215-531-0004

Paul J. Dougherty

Reg. 61967

Patent agent

Paul J. Dougherty

Springfield, PA · 19064

267-608-5468

Lisa A. Douglas

Reg. 56003

Patent agent

Greencastle, PA · 17225

717-597-7777

Sean Michael Douglass

Reg. 78157

Patent attorney

Panitch Schwarze Belisario & Nadel LLP

Philadelphia, PA · 19103

215-965-1232

Dimitri P Dovas

Reg. 51627

Patent attorney

Dovas Law P.C.

Philadelphia, PA · 19147

267-266-6357

Kenneth James Dow

Reg. 32890

Patent attorney

K Dow Consulting Services PLLC

Bryn Mawr, PA · 19010

732-718-1343

Catherine M. Doyle

Reg. 62417

Patent attorney

MacDonlad, Illig, Jones & Britton, LLP

Erie, PA · 16507

814-870-7662

Kathryn Doyle

Reg. 36317

Patent attorney

Saul Ewing Arnstein & Lehr, LLP

Philadelphia, PA · 19102

215-972-7734

Timothy J Doyle

Reg. 58127

Patent attorney

Baker Hostetler

Philadelphia, PA · 19103-7501

215-564-1412

John E Drach

Reg. 32891

Patent attorney

Paul & Paul

Philadelphia, PA · 19103

215-568-4900

Aaron D. Drew

Reg. 61880

Patent attorney

Pennsylvania Department of Revenue

Harrisburg, PA · 17128

717-705-6627

Jordan J Driks

Reg. 22029

Patent attorney

Merion Station, PA · 19066

610-664-0290

Benjamin D Driscoll

Reg. 41571

Patent attorney

SAP America

Newtown Square, PA · 19073

610-661-4663

Stephen J Driscoll

Reg. 37564

Patent attorney

FisherBroyles LLP

Philadelphia, PA · 19103

484-444-2262

Kevin M Drucker

Reg. 47537

Patent attorney

IPVillage LLC

Philadelphia, PA · 19118

484-272-7287

Michael T Duckworth

Reg. 62703

Patent attorney

K&L Gates LLP

Pittsburgh, PA · 15222-2613

412-355-6728

Emily C Dugan

Reg. 68938

Patent agent

Philadelphia, PA · 19134

267-671-2274

Michael E. Dukes

Reg. 59878

Patent attorney

Cohen & Grigsby, P.C.

Pittsburgh, PA · 15222

412-297-4900

Robert J Duminiak

Reg. 51636

Patent attorney

Bucks County District Attorney's Office

Doylestown, PA · 18901

215-348-6342

David A. DuMont

Reg. 72814

Patent attorney

United States District Court for the Western District of Pennsylvania

Pittsburgh, PA · 15219

412-208-7560

Sammy George Duncan· Jr

Reg. 46675

Patent attorney

The Webb Law Firm

Pittsburgh, PA · 15222

412-471-8815

Daniel Mark Dunlap

Reg. 52473

Patent attorney

Allegheny Energy

Greensburg, PA · 15601

724-838-6188

Common questions

Do I need a patent attorney based in Pennsylvania?

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 Pennsylvania-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 Pennsylvania?

1,920 active USPTO-registered patent practitioners list a Pennsylvania 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.