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 Caesar, Rivise, Bernstein, Cohen, Johnson & Johnson Law Department, and Patent Law Offices.

Top cities in Pennsylvania

All practitioners in Pennsylvania

William J Castillo

Reg. 56515

Patent attorney

Caesar, Rivise, Bernstein, Cohen

Philadelphia, PA · 19103

215-567-2010

Outi E Catterton

Reg. 67709

Patent agent

Johnson & Johnson Law Department

Spring House, PA · 19455

215-628-5010

Gerald Joseph Cechony

Reg. 31335

Patent attorney

Patent Law Offices

Philadelphia, PA · 19118

267-536-2945

Angelo N Chaclas

Reg. 39134

Patent attorney

Trinseo LLC

Wayne, PA · 19087

610-240-3218

Deping Chai

Reg. 63187

Patent attorney

Morgan, Lewis & Bockius LLP

Philadelphia, PA · 19103

215-963-5747

Benjamin S Chalfin

Reg. 74181

Patent agent

Flaster Greenberg PC

Philadelphia, PA · 19103

215-587-5607

Carl Chan

Reg. 42399

Patent attorney

Media, PA · 19063

774-994-0224

Fieldi H Chan

Reg. 59053

Patent attorney

media, PA · 19063

650-691-5634

Suresh Chandran

Reg. 55049

Patent agent

Philip Services Corporation

Fort Washington, PA · 19034

215-643-5466

WooYoung Chang

Reg. 80568

Patent attorney

Pittsburgh, PA · 15222

412-471-8815

Alvin P Changco

Reg. 48625

Patent agent

Reading, PA · 19611

610-334-2622

John C Charlton

Reg. 78205

Patent agent

Glenside, PA · 19038

267-280-7767

Bruce J Chasan

Reg. 38764

Patent attorney

Law Offices of Bruce J. Chasan, LLC.

Philadelphia, PA · 19102

215-567-4400

Geoffery Lowell Chase

Reg. 28059

Patent attorney

Alburtis, PA · 18011

610-533-7129

Riya V Chaudhari

Reg. 78173

Patent agent

Panitch Schwarze Belisario & Nadel LLP

Philadelphia, PA · 19103

215-965-1284

Thomas R Chawluk· Jr.

Reg. 82608

Patent attorney

Philadelphia, PA · 19148

610-633-5681

Jefferson A. Cheatham

Reg. 67621

Patent attorney

Panitch Schwarze Belisario & Nadel LLP

Philadelphia, PA · 19103

215-965-1358

Christy A Cheever

Reg. 52722

Patent attorney

Berwyn, PA · 19312

610-993-7640

Fu Chen

Reg. 34089

Patent agent

Chemical Consultant

West Chester, PA · 19382

610-793-3885

Haiyan Chen

Reg. 43539

Patent attorney

Wynnewood, PA · 19096

Joey Tsu-Yi Chen

Reg. 73142

Patent attorney

FirstEnergy Service Company

Reading, PA · 19612

610-921-6784

Lin Chen

Reg. 73405

Patent attorney

Spring House, PA · 19477

215-729-9231

Maya Cheriyan

Reg. 77599

Patent attorney

Eckert Seamans Cherin & Mellott, LLC

Pittsburgh, PA · 15219

412-566-6000

Vadim E Cherkasov

Reg. 65243

Patent attorney

McCarter & English, LLP

Philadelphia, PA · 19103

215-979-3893

Kathryn M Chesnick

Reg. 79663

Patent agent

Clifford Township, PA · 18407

570-878-2384

Deborah M Chess

Reg. 44611

Patent attorney

Mercer, PA · 16137

Noland J Cheung

Reg. 39138

Patent attorney

Eckert Seamans, et al.

Pittsburgh, PA · 15219

412-566-6048

Viralsinh H. Chhasatia

Reg. 77406

Patent agent

Aylin IP

Paoli, PA · 19301

607-727-5040

Anthony R Chi

Reg. 41479

Patent agent

Kennet Square, PA · 19348

302-992-5305

Marshall J Chick

Reg. 26853

Patent attorney

Lima, PA · 19037

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.