Maryland

Patent attorneys in Maryland

Maryland hosts 1,200 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 Maryland. 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 National Institutes of Health, MacroGenics, Inc., and Parker Patent Services.

Top cities in Maryland

All practitioners in Maryland

Joseph E Panigot

Reg. 42057

Patent attorney

MacroGenics, Inc.

Rockville, MD · 20850

301-354-0686

John A Papavasiliou

Reg. 53432

Patent agent

Timonium, MD · 21093

410-308-2405

Una Y Park

Reg. 67919

Patent agent

National Institutes of Health

Bethesda, MD · 20892

301-435-4643

Yeseul Park

Reg. 81175

Patent agent

California, MD · 20619

702-427-3876

Roscoe V Parker· Jr

Reg. 40265

Patent agent

Parker Patent Services

Silver Spring, MD · 20904

301-384-4971

Chandra E W Parnell

Reg. 67523

Patent attorney

Berwyn Heights, MD · 20740

336-254-3317

Elizabeth L Parsons

Reg. 52499

Patent attorney

Potomac, MD · 20854

202-789-1585

Matthew L. Parulski

Reg. 81750

Patent agent

Silver Spring, MD · 20910

585-410-1783

Devaki N Patel

Reg. 79597

Patent agent

Woodstock, MD · 21163

443-570-5883

Jay Mehul Patel

Reg. 76921

Patent attorney

Reisterstown, MD · 21136

443-415-2453

Sumant Pathak

Reg. 70269

Patent attorney

Ellicott City, MD · 21043

410-465-6678

William Alexander LeMay Patterson

Reg. 83381

Patent agent

Dundalk, MD · 21222

305-304-7970

Matthew M. Patton

Reg. 66770

Patent agent

Baltimore, MD · 21212

410-499-4715

Elizabeth J Pawlak

Reg. 34520

Patent agent

Pawlak and Associates, PC

Marbury, MD · 20658

954-821-6878

Bryon M Pearsall

Reg. 63166

Patent attorney

FDA Office of Medical Policy

Silver Spring, MD · 20993

301-796-9617

Douglas H Pearson

Reg. 47851

Patent attorney

IBM Corporation

ANNAPOLIS JUNCTION, MD · 20701-1019

240-463-4367

Robin John Pecora

Reg. 29015

Patent attorney

Baltimore, MD · 21202

410-539-1990

Leigh A Penfield

Reg. 37050

Patent attorney

Johns Hopkins Technology Ventures

Baltimore, MD · 21205

410-223-1689

Tengteng Tracy Peng

Reg. 70998

Patent agent

Bethesda, MD · 20814

206-724-6007

Necois D Penn

Reg. 71188

Patent agent

Rockville, MD · 20850

240-314-4400

Jeanine M. Pennington

Reg. 67638

Patent agent

John Hopkins University Technology Transfer

Baltimore, MD · 21201

410-516-5680

Matthew A Pequignot

Reg. 43851

Patent attorney

Pequignot + Myers LLC

Chevy Chase, MD · 20815

202-328-1200

Alfred Columbus Perham

Reg. 32807

Patent agent

Upper Marlboro, MD · 20772

301-627-2234

Glenn J Perry

Reg. 28458

Patent attorney

Silver Spring, MD · 20904

202-903-3070

Jackson Ray Petrella

Reg. 903024

Limited recognition

University of Maryland School of Law

Baltimore, MD · 21201

617-637-2649

Nathaniel J Pettigrew

Reg. 59007

Patent agent

Peraton

Catonsville, MD · 21228

281-536-7540

Isaac J Pflaum

Reg. 64493

Patent agent

Plum Goodland Company

Kensington, MD · 20895

516-768-9781

Phuong Thi Kim Pham

Reg. 53463

Patent agent

National Institutes of Health

Bethesda, MD · 20892-1381

301-641-9102

Tu A. Phan

Reg. 59392

Patent attorney

Rockville, MD · 20853

703-597-7252

Kevin J. Phipps

Reg. 81545

Patent agent

Rosenberg, Klein & Lee

Ellicott City, MD · 21043

410-465-6678

Common questions

Do I need a patent attorney based in Maryland?

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 Maryland-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 Maryland?

1,200 active USPTO-registered patent practitioners list a Maryland 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.