Pennsylvania

Patent attorneys in Pennsylvania

Pennsylvania hosts 1,907 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 and Mellott LLC, Lipton, Weinberger & Husick, and Baker & Hostetler LLP.

Top cities in Pennsylvania

All practitioners in Pennsylvania

Stanley Weinberg

Reg. 25276

Patent attorney

Elkins Park, PA · 19027

215-782-1718

Laurence A Weinberger

Reg. 27965

Patent attorney

Lipton, Weinberger & Husick

Exton, PA · 19341

610-431-1703

Stanton D Weinstein

Reg. 28349

Patent attorney

Fort Washington, PA · 19034-1627

215-285-5013

Theresa M. Weisenberger

Reg. 65559

Patent attorney

Baker & Hostetler LLP

Philadelphia, PA · 19104-2891

215-568-3100

Dena Meyer Weker

Reg. 32540

Patent attorney

Wynnewood, PA · 19096

610-642-6362

Kevin Patrick Weldon

Reg. 47307

Patent attorney

Greensburg, PA · 15601

703-298-4396

Stanley M Welsh

Reg. 27604

Patent agent

Doylestown, PA · 18902

215-794-2414

Emily J. Wen

Reg. 84712

Patent agent

The Webb Law Firm

Pittsburgh, PA · 15222

267-670-5805

Patricia A Wenger

Reg. 42218

Patent attorney

Wenger Law Offices

Media, PA · 19063

610-566-3040

Michael W J West

Reg. 53761

Patent agent

Landenberg, PA · 19350-9115

302-559-3642

Richard V Westerhoff

Reg. 24454

Patent attorney

Eckert Seamans Cherin and Mellott LLC

Pittsburgh, PA · 15219

412-566-6090

Thomas C Wettach

Reg. 24455

Patent attorney

Cohen & Grace LLC

Pittsburgh, PA · 15237

412-527-4832

Lyndanne M Whalen

Reg. 29457

Patent attorney

Bayer Materialscience LLC

Pittsburgh, PA · 15205

412-777-3843

Linda D Wheeler

Reg. 45210

Patent attorney

Wheeler Law Offices, P.C.

Pittsburgh, PA · 15222

724-275-7750

Geoffrey K. White

Reg. 62684

Patent attorney

McNees Wallace & Nurick

Harrisburg, PA · 17101

412-600-9109

Thomas James White

Reg. 36053

Patent attorney

Westinghouse Electric Company, LLC

Cranberry Township, PA · 16066

412-374-6609

Roger D. Whitley

Reg. 78364

Patent agent

Air Products

Allentown, PA · 18106

610-481-3961

Stuart Andrew Whittington

Reg. 45215

Patent agent

Volpe Koenig LLP

Philadelphia, PA · 19103

215-255-9230

Jeffrey R. Wiand

Reg. 76610

Patent agent

Pottstown, PA · 19465

484-942-9076

Charles F Wieland· III

Reg. 33096

Patent attorney

Panitch Schwarze Belisario & Nadel LLP

Philidelphia, PA · 19103

215-965-1305

John A. Wilaj· Jr

Reg. 74116

Patent attorney

Kennametal Inc.

Latrobe, PA · 15650

330-509-9740

James L Wilcox

Reg. 30234

Patent attorney

Wilcox Law Group

Parkside, PA · 18944

267-283-7591

Clinton H Wilkinson

Reg. 43267

Patent agent

Law Offices of Charles A. Wilkinson

Bethlehem, PA · 18016-1426

610-867-9700

Nathaniel C Wilks

Reg. 62867

Patent attorney

Eckert Seamans Cherin and Mellott LLC

Pittsburgh, PA · 15219

412-566-6993

Lindsay B. Willett

Reg. 68553

Patent attorney

L. Beth Willett, Esq.

Kennett Square, PA · 19348

810-964-2927

Daniel Williams

Reg. 35738

Patent attorney

Forkston Township, PA · 18629

570-833-4127

Darrell E Williams

Reg. 45222

Patent agent

Darrell E. Williams, Esq.

Bridgeville, PA · 15017

412-983-3901

James R Williams

Reg. 43268

Patent attorney

New Castle, PA · 16105

724-944-3452

Tyler D Williams-Amaker

Reg. 84014

Patent agent

Philadelphia, PA · 19144

267-266-7217

John K Williamson

Reg. 27845

Patent attorney

K&L Gates LLP

Pittsburgh, PA · 15222-2613

412-355-6438

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?

1,907 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.