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 Eckert Seamans Cherin & Mellott, LLC, K&L Gates LLP, and Pennsylvania State University.

Top cities in Pennsylvania

All practitioners in Pennsylvania

Robert Paul Lenart

Reg. 30654

Patent attorney

Bridgeville, PA · 15017

412-221-7283

Teresa O'Connor Lenington

Reg. 53399

Patent agent

Venetia, PA · 15367

832-498-8563

Stephen L. Lenkey

Reg. 59264

Patent agent

Pennsylvania State University

University Park, PA · 16802

814-867-5795

James K. Leonard

Reg. 71144

Patent attorney

GlaxoSmithKline

Collegeville, PA · 19426

215-756-5565

Robert D Leonard

Reg. 57204

Patent attorney

Volpe and Koenig, P.C.

Philadelphia, PA · 19103

215-568-6400

Donald Carl Lepiane

Reg. 25996

Patent attorney

Jefferson Hills, PA · 15025

412-653-3632

Shawn K Leppo

Reg. 50311

Patent attorney

McNees, Wallace & Nurick, LLC

Harrisburg, PA · 17108

717-232-8000

Eric A Lerner

Reg. 46054

Patent agent

Eckert Seamans Cherin & Mellott, LLC

Pittsburgh, PA · 15219

412-566-6085

Mark R Leslie

Reg. 36360

Patent attorney

K&L Gates LLP

Pittsburgh, PA · 15222

412-355-6271

Jeffrey W Lesovitz

Reg. 63461

Patent attorney

Philadelphia, PA · 19103-8956

215-564-8956

Richard L Leung

Reg. 60711

Patent agent

Morgan, Lewis & Bockius LLP

Philadelphia, PA · 19103

215-963-5082

Thomas D. Leusner

Reg. 71168

Patent agent

Parker Hannifin, Inc.

Pennsburg, PA · 18073

267-374-6065

Rebecca J Leventopoulos

Reg. 53720

Patent attorney

Disciplinary Board of the Supreme Court of Pennsylvania

Pittsburgh, PA · 15219

412-565-3173

Gary Harris Levin

Reg. 28734

Patent attorney

Baker & Hosterler LLP

Philadelphia, PA · 19103

215-568-3100

Leana Levin

Reg. 51939

Patent attorney

DENTSPLY International Inc.

York, PA · 17405-2558

717-845-7511

Paul D. Levin

Reg. 64983

Patent agent

K&L Gates LLP

Pittsburgh, PA · 15222-2613

412-355-6500

Philip E Levy

Reg. 40700

Patent attorney

Eckert Seamans Cherin & Mellott, LLC

Pittsburgh, PA · 15219

412-566-6000

Christopher Roland Lewis

Reg. 36201

Patent attorney

Arkema Inc.

King of Prussia, PA · 19406

610-205-7654

Jon M Lewis

Reg. 26479

Patent attorney

Greensburg, PA · 15601

724-836-4730

Sandra J. Lex

Reg. 71498

Patent attorney

Mendelsohn Dunleavy, PC

Philladelphia, PA · 19102

215-557-6656

Dansu Li

Reg. 78212

Patent agent

Warrington, PA · 18976

617-388-3669

Edward P Li

Reg. 62481

Patent agent

Hellertown, PA · 18055

610-653-6828

Francine F Li

Reg. 68056

Patent attorney

Blank Rome LLP

Philadelphia, PA · 19103

215-569-5716

Li Li

Reg. 800169

Limited recognition

Pittsburgh, PA · 15219

412-208-8100

Shawn Shiqing Li

Reg. 58132

Patent agent

Zaher Li PLLC

Philadelphia, PA · 19103

267-684-9223

Xingyue Li

Reg. 82830

Patent agent

Collegeville, PA · 19426

908-208-4307

Yuqi Li

Reg. 65855

Patent agent

Blue Bell, PA · 19422

215-681-8556

Yuqi Li

Reg. 80363

Patent attorney

BakerHostetler

Philadelphia, PA · 19103

215-564-3236

Jack Lin

Reg. 61747

Patent attorney

Teva Pharmaceuticals

Frazer, PA · 19355

610-727-6272

Robert O Lindefjeld

Reg. 39486

Patent attorney

Nantero, Inc.

Pittsburgh, PA · 15228

412-437-0060

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.