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 The Webb Law Firm, Yoshida & Associates LLC, and American Regent, Inc..

Top cities in Pennsylvania

All practitioners in Pennsylvania

Michele K Yoder

Reg. 41562

Patent agent

The Webb Law Firm

Pittsburgh, PA · 15222

412-471-8815

Kevin W Yoegel

Reg. 70185

Patent attorney

Paoli, PA · 19301

David S Yoon

Reg. 69489

Patent attorney

Yardley, PA · 19067

215-962-9546

Michael Timothy York

Reg. 48054

Patent agent

New Kensington, PA · 15068

248-504-1143

Kenichiro K Yoshida

Reg. 37009

Patent attorney

Yoshida & Associates LLC

Philadelphia, PA · 19103

215-599-0604

William Charles Youngblood

Reg. 50524

Patent attorney

American Regent, Inc.

Norristown, PA · 19403

631-772-3508

Elizabeth R. Youngkin

Reg. 68531

Patent agent

Pittsburgh, PA · 15213

484-347-7090

Hanjen Yu

Reg. 79864

Patent agent

K&L Gates LLP

Pittsburgh, PA · 15222-2613

412-355-2844

Wei Yu

Reg. 75617

Patent attorney

Dentons Cohen & Grigsby P.C.

Pittsburgh, PA · 15222

412-297-4716

Eric J Yurinko

Reg. 77096

Patent agent

K & L Gates

Pittsburgh, PA · 15222

412-355-6705

Peter Kraft Zacharias

Reg. 62204

Patent attorney

CNH Industrial America LLC

New Holland, PA · 17557

717-239-9772

Alfred W Zaher

Reg. 42248

Patent attorney

Buchanan Ingersoll & Rooney PC

Philadelphia, PA · 19102-2555

215-665-3880

James A Zak

Reg. 60190

Patent attorney

Three10 Consulting

Pittsburgh, PA · 15233

651-357-8517

Lawrence P Zale

Reg. 34461

Patent attorney

Zale Patent Law, Inc.

Scott Township, PA · 18433

570-878-5000

Larry S Zelson

Reg. 48553

Patent attorney

Air Products & Chemicals, Inc.

Allentown, PA · 18195-1501

610-481-7756

Fanwen Zeng

Reg. 58811

Patent agent

Rohm and Haas Company

Spring House, PA · 19477

215-619-5754

John W Zerr

Reg. 56009

Patent attorney

Pittsburgh, PA · 15237

724-866-3938

Jeffrey Wei Zhang

Reg. 64328

Patent agent

Newtown, PA · 18940

267-364-3402

Qingfen Zhang

Reg. 75518

Patent agent

Wayne, PA · 19087

520-390-8123

Xiaoying Zhang

Reg. 80506

Patent attorney

Pittsburgh, PA · 15228

412-519-5417

Xiyan Zhang

Reg. 68571

Patent attorney

Stratum Law LLC

Bala Cynwyd, PA · 19004

215-395-8756

Zhiqiang Zhao

Reg. 72984

Patent attorney

The Dow Chemical Company

Collegeville, PA · 19426

610-244-7835

Shiying Zheng

Reg. 65288

Patent agent

Center Valley, PA · 18034

585-520-1180

Ling Zhong

Reg. 48290

Patent attorney

RatnerPrestia

King of Prussia, PA · 19406

610-407-0700

Chad E Ziegler

Reg. 44273

Patent attorney

Flaster Greenberg

Philadelphia, PA · 19103

215-587-5688

Robert F Zielinski

Reg. 34286

Patent attorney

Law Offices of Robert F. Zielinski, LLC

Philadelphia, PA · 19107

215-731-9100

Glenn D Zimmerman

Reg. 57580

Patent agent

Elizabethtown, PA · 17022

717-689-4599

Ryan L Zimmerman

Reg. 53830

Patent attorney

Hershey, PA · 17033

717-592-8277

Mark R Zolfaghari

Reg. 39437

Patent agent

St. Luke's Hospital of Bethlehem, Pennsylvania

Bethlehem, PA · 180125

484-940-526-26422300

John A Zurawski

Reg. 61524

Patent attorney

Ballard Spahr LLP

Philadelphia, PA · 19103

215-864-8855

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.