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 BakerHostetler, Volpe Koenig, and GlaxoSmithKline.

Top cities in Pennsylvania

All practitioners in Pennsylvania

Jessica E Lindsay-Green

Reg. 62625

Patent attorney

Venetia, PA · 15367

724-941-8136

Daniel R Ling

Reg. 53223

Patent attorney

Volpe Koenig

Philadelphia, PA · 19103

215-568-6400

Lorraine B Ling

Reg. 35251

Patent attorney

GlaxoSmithKline

King of Prussia, PA · 19406

610-270-7513

Nicholas B. Lingle

Reg. 75038

Patent attorney

West Pharmaceutical Services, Inc.

Exton, PA · 19341

610-594-2900

Steven J. Link

Reg. 71503

Patent attorney

Kensey Nash Corporation

Exton, PA · 19341

484-713-2139

Lisa M. Lint

Reg. 60856

Patent agent

DLA Piper

Philadelphia, PA · 19103

215-656-3308

Caroline Dusheck Liott

Reg. 48099

Patent agent

Easton, PA · 18042

Carl R Lippert

Reg. 22313

Patent attorney

Pittsburgh, PA · 15215

412-781-5355

Fang Liu

Reg. 51283

Patent attorney

Panitch Schwarze Belisario & Nadel LLP

Philadelphia, PA · 19103

215-965-1280

Guodong Liu

Reg. 74350

Patent attorney

Johnson & Johnson

Spring House, PA · 19312

000-000-0000

Jianwei Liu

Reg. 55390

Patent agent

West Chester, PA · 19382

Shan Liu

Reg. 67718

Patent attorney

GSK

Collegeville, PA · 19426

267-300-6322

Xun Liu

Reg. 81172

Patent agent

Philadelphia, PA · 19130

857-345-5138

Thomas Lizzi

Reg. 35252

Patent attorney

IP & Internet Law North, LLC

Zelienople, PA · 16063

724-452-4414

Thomas N Ljungman

Reg. 32041

Patent agent

Greensburg, PA · 15601-0130

724-836-2305

Stephanie A Lodise

Reg. 51430

Patent attorney

BakerHostetler

Philadelphia, PA · 19103-7501

215-564-8918

Jonathan E. Loeb

Reg. 62884

Patent agent

Jonathan E. Loeb, Ph. D

Philadelphia, PA · 19118

650-714-7988

Deborah A Logan

Reg. 54279

Patent attorney

Lipton, Weinberger & Husick

Newton Square, PA · 19073

610-228-4195

Ryan M. Logan

Reg. 72740

Patent attorney

Post & Schell, P.C.

Harrisburg, PA · 17101

717-612-6017

Ronald Sandor Lombard

Reg. 28321

Patent attorney

Murrysville, PA · 15668

724-733-1999

Jonathan G. Lombardo

Reg. 71734

Patent attorney

Baker & Hostetler LLP

Philadelphia, PA · 19103

215-568-3100

Charles Joseph Long

Reg. 26298

Patent attorney

Smith, Anderson, Baker and Long

York, PA · 17401

717-845-9641

Timothy M. Long

Reg. 59652

Patent attorney

Mylan, Inc

Canonsburg, PA · 15317

724-485-6436

Armando Lopez

Reg. 81085

Patent agent

Philadelphia, PA · 19147

609-369-2903

Henryalexander M. Lopez

Reg. 84481

Patent attorney

Philadelphia, PA · 19103

425-218-5280

Dale Robert Lovercheck

Reg. 28638

Patent attorney

Media, PA · 19063

484-424-3735

Gail A Lowe

Reg. 45296

Patent attorney

Philadelphia, PA · 19119

215-843-3576

Kao H Lu

Reg. 43761

Patent attorney

Ryder Lu Mazzeo & Konieczny LLC

Havertown, PA · 19083

610-446-2563

Joseph Lucci

Reg. 33307

Patent attorney

BakerHostetler

Philadelphia, PA · 19103-7501

215-564-8370

Mark R. Luderer

Reg. 80046

Patent attorney

Flaster Greenberg

Evans City, PA · 16033

215-510-4625

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.