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 CSL, Stradley Ronon Stevens & Young, LLP, and Innoventiv IP.

Top cities in Pennsylvania

All practitioners in Pennsylvania

Victoria E Spataro

Reg. 58005

Patent attorney

CSL

King of Prussia, PA · 19406

610-290-7925

James Vaughn Spencer

Reg. 66438

Patent attorney

Landenberg, PA · 19350

412-580-4748

Christopher M. Spletzer

Reg. 52240

Patent attorney

Stradley Ronon Stevens & Young, LLP

Malvern, PA · 19355-1481

610-640-5800

Todd W Spradau

Reg. 52242

Patent attorney

Innoventiv IP

Downingtown, PA · 19335

484-288-9295

Diane Herrup Sprunt

Reg. 33400

Patent attorney

Winfield, PA · 17889

570-524-5955

Harish Srinivas

Reg. 69198

Patent agent

Cheswick, PA · 15024

724-265-0152

Christopher S. Stabley

Reg. 64262

Patent agent

Synthes, Inc.

West Chester, PA · 19380

610-719-5742

Gary R Stadelman

Reg. 37734

Patent attorney

U. S. States Steel Corporation

Pittsburgh, PA · 15219

412-433-2994

Robert F Stahl· Sr

Reg. 37566

Patent agent

Lancaster, PA · 17602

717-464-1813

Adam D. Stallard

Reg. 71610

Patent attorney

Law Office of Adam Douglas Stallard

Linesville, PA · 16424-0082

814-818-0081

Stephen G Stanton

Reg. 35690

Patent attorney

Law Offices of Stephen G Stanton

Paoli, PA · 19301

610-296-5194

Richard Starynski

Reg. 50984

Patent attorney

Naval Surface Warfare Ctr

Philadelphia, PA · 19112

215-897-8876

Shannon K Stauffer

Reg. 78517

Patent agent

K&L Gates Center

Pittsburgh, PA · 15222

412-355-6277

Karl E Stauss

Reg. 40827

Patent attorney

The Dow Chemical Company

Collegeville, PA · 19426

610-244-7834

Cheyanne Rain Steen

Reg. 900867

Limited recognition

Penn State Law, The Pennsylvania State University

University Park, PA · 16802

304-365-7127

Michael D Steffensmeier

Reg. 37735

Patent attorney

Ansys, Inc.

Canonsburg, PA · 15317

614-537-9338

Thomas C Steidel

Reg. 43157

Patent agent

Lititz, PA · 17543

443-844-4084

Barry Allen Stein

Reg. 25257

Patent attorney

Caesar Rivise, PC

Philadelphia, PA · 19103

215-567-2010

Nora L Stein

Reg. 36689

Patent attorney

GlaxoSmithKline

Collegeville, PA · 19426

484-949-5801

Peter M Stein

Reg. 48072

Patent attorney

Camp Hill, PA · 17011

717-763-7427

Christopher Stella

Reg. 55647

Patent attorney

Bethlehem, PA · 18017

610-868-0129

Sharon L Stemple

Reg. 56932

Patent attorney

Camp Hill, PA · 17001

201-707-4136

Michael R. Stephenson

Reg. 79682

Patent agent

Buchanan Ingersoll & Rooney PC

Pittsburgh, PA · 15219

412-562-1538

Yuriy Petro Stercho

Reg. 33797

Patent attorney

Pottstown, PA · 19465

610-420-6303

James J Sterling

Reg. 46035

Patent attorney

Greencastle, PA · 17225

305-804-1579

Craig M. Sterner

Reg. 58059

Patent attorney

Armstrong World Industries

Lancaster, PA · 17603

717-396-5710

James R Stevenson

Reg. 38755

Patent attorney

Bayer Corporation

Indianola, PA · 15051-9759

412--40-6-3280

Robert W Stevenson

Reg. 31064

Patent attorney

Caesar Rivise

Philadelphia, PA · 19103

215-567-2010 X112

Duane Arthur Stewart· III

Reg. 54468

Patent attorney

Buchanan Ingersoll & Rooney PC

Pittsburgh, PA · 15219-1410

412-562-1622

David P. Stitzel

Reg. 44360

Patent attorney

Reed Tech, a LexisNexis Company

Horsham, PA · 19044

267-963-7179

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.