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 Buchanan Ingersoll & Rooney PC, University of Pennsylvania, and Condo Roccia Koptiw LLP.

Top cities in Pennsylvania

All practitioners in Pennsylvania

Michael Louis Dever

Reg. 32216

Patent attorney

Buchanan Ingersoll & Rooney PC

Pittsburgh, PA · 15219

412-562-1637

Gerard M Devlin· Jr

Reg. 43586

Patent attorney

Organon LLC

Landsdale, PA · 19446

732-564-5486

Kristie A Deyerle

Reg. 51070

Patent attorney

Thomas Jefferson Univ

Philadelphia, PA · 19107

215-503-0116

Donald T Deyo

Reg. 43587

Patent attorney

University of Pennsylvania

Philadelphia, PA · 19704

215-573-9970

Pranita Dhungana

Reg. 800128

Limited recognition

Jones Day

Pittsburgh, PA · 15219

412-394-9588

Michael V Di Girolamo

Reg. 73832

Patent attorney

Davis Bucco

Conshohocken, PA · 19428

610-238-0880

Anthony L DiBartolomeo

Reg. 37308

Patent attorney

SAP

Newtown Square, PA · 19073

610-661-3271

Diana DiBerardino

Reg. 45653

Patent attorney

DiBerardino McGovern IP Group LLC

Pittsburgh, PA · 15228

412-341-1298

Benjamin C Dibling

Reg. 65361

Patent agent

University of Pennsylvania

Philadelphia, PA · 19104

215-880-1158

Eric A Dichter

Reg. 41708

Patent attorney

Johnson & Johnson

Spring House, PA · 19477

215-628-7966

William Edward Dickheiser

Reg. 30169

Patent attorney

Glen Mills, PA · 19342

610-558-3486

George D Dickos

Reg. 30048

Patent attorney

K&L Gates LLP

Pittsburgh, PA · 15222-2613

412-355-6785

Paul DiDomenico

Reg. 48875

Patent agent

Rockwel Realty

Pittsburgh, PA · 15206

412-362-3333

Ibrahima Diedhiou

Reg. 80811

Patent agent

Buchanan Ingersoll & Rooney PC

King of Prussia, PA · 19406

610-407-0700

Dwight G Diehl

Reg. 36421

Patent attorney

Bedford, PA · 15522

814-623-2513

Heather L Dieterich

Reg. 81079

Patent agent

Pittsburgh, PA · 15243

337-912-8862

Andrew N Dietrick

Reg. 75669

Patent attorney

DLA Piper

Philadelphia, PA · 19103

570-906-0745

James G Dilmore

Reg. 51618

Patent attorney

Bayer

Indianola, PA · 15051

412-370-2137

Dara Lisa Dinner

Reg. 33680

Patent attorney

Glaxo Smith Kline

King Of Prussia, PA · 19406

610-270-5017

William J DiPaolo

Reg. 37307

Patent agent

Aspinwall, PA · 15215

412-965-5253

Abigail M DiVito Evans

Reg. 82930

Patent agent

Wayne, PA · 19087

215-268-3893

Anthony J Dixon

Reg. 26866

Patent attorney

Anthony J. Dixon, Atty at Law

West Hazleton, PA · 18202

570-455-7112

Chloe P. S. Dixon

Reg. 79927

Patent attorney

Condo Roccia Koptiw LLP

Philadelphia, PA · 19103

215-543-3762

Jane Far-Jine Djung

Reg. 70344

Patent agent

GSK

Collegeville, PA · 19426

215-970-3401

Christopher S Dodson

Reg. 70473

Patent agent

Baily Snyder, LLC

Malvern, PA · 19355

484-318-2490

Alan M Doernberg

Reg. 27781

Patent attorney

Thermo Fisher Scientific, Inc.

Pittsburgh, PA · 15275

724-517-2451

Kyle W. Doerrler

Reg. 79871

Patent attorney

Condo Roccia Koptiw LLP

Philadelphia, PA · 19103

814-441-1092

Guy Thomas Donatiello

Reg. 33167

Patent attorney

Endo Pharmaceuticals, Inc.

Malvern, PA · 19355

484-216-4275

Tyler R. Donato

Reg. 82958

Patent attorney

Saxton & Stump

Allentown, PA · 18104

484-960-8155

John C Donch· Jr

Reg. 43593

Patent attorney

Volpe and Koenig, PC

Philadelphia, PA · 19103

215-568-6400

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.