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 Becton Dickinson & Company, Alembic Enterprises, LLC, and The Know Worldwide Inc..

Top cities in Maryland

All practitioners in Maryland

Traci Lynn Halerz

Reg. 65917

Patent agent

Elkton, MD · 21921

410-392-2734

Robert M Hallenbeck

Reg. 31364

Patent attorney

Becton Dickinson & Company

Sparks, MD · 21150

410-773-6905

Melvin L Halpern

Reg. 26274

Patent attorney

Potomac, MD · 20854

301-956-3583

Gregory S Hamilton

Reg. 55242

Patent agent

Alembic Enterprises, LLC

Catonsville, MD · 21228-3528

410-302-7830

Yan B Hankin

Reg. 69633

Patent attorney

Rockville, MD · 20853

401-556-6797

Victoria D Hao

Reg. 47630

Patent attorney

Chevy Chase, MD · 20815

202-600-2086

Vincent P Harper· Jr.

Reg. 73901

Patent agent

Chevy Chase, MD · 20815

703-405-8673

Timothy P Harrigan

Reg. 51784

Patent agent

Baltimore, MD · 21231

508-740-8614

Mahmud Hasan

Reg. 83438

Patent agent

Baltimore, MD · 21244

267-250-4953

Jacqueline C Hatherill

Reg. 78372

Patent attorney

The Know Worldwide Inc.

Chevy Chase, MD · 20815

301-231-9473

Dylan T. Haversack

Reg. 77786

Patent agent

Rockville, MD · 20852

301-502-5783

Matthew P Hayden

Reg. 55853

Patent attorney

National Institutes of Health

Bethesda, MD · 20892-6911

301-402-1864

Noah J Hayward

Reg. 59515

Patent attorney

The Johns Hopkins University

Laurel, MD · 20723-6099

443-778-4386

Blondel Hazel

Reg. 38707

Patent agent

Hyattsville, MD · 20783

301-559-0729

Stuart N Hecker

Reg. 49080

Patent agent

Annapolis, MD · 21403

410-280-2614

Lee C Heiman

Reg. 41827

Patent attorney

Silver Spring, MD · 20910

240-432-0789

Colin C Heitzmann

Reg. 55256

Patent attorney

Travere Therapeutics

ROCKVILLE, MD · 20850

202-290-5702

Phillip F Heller

Reg. 47639

Patent agent

Baltimore, MD · 21214

410-236-8221

Seth I. Heller

Reg. 77768

Patent attorney

Food and Drug Administration

Silver Spring, MD · 20993

240-402-6502

Joseph K Hemby· Jr

Reg. 42652

Patent attorney

Glenn Dale, MD · 20769

301-352-6079

Douglas Boyd Henderson

Reg. 20291

Patent attorney

Potomac, MD · 20854

202-365-1805

John T Henri

Reg. 63973

Patent agent

U.S. Dept of Agriculture, Agricultural Research Service

Beltsville, MD · 20705

720-938-2078

Barry J Herman

Reg. 51254

Patent attorney

Womble Bond Dickinson (US) LLP

Baltimore, MD · 21202

410-545-5830

Jesus J Hernandez

Reg. 62570

Patent attorney

Department of Navy - Naval Sea Systems Command

Bethesda, MD · 20817-5700

301-227-2004

Allan D Herrmann

Reg. 52417

Patent agent

Bethesda, MD · 20814

301-493-9148

Ruth G Hidalgo-Hernandez

Reg. 80933

Patent agent

Bowie, MD · 20716

787-342-1500

Kirsten J. Hiera

Reg. 72650

Patent attorney

United States Army Public Health Command

Aberdeen Proving Ground, MD · 21010

410-436-3996

Martin J Hindel

Reg. 76933

Patent attorney

Sliver Spring, MD · 20901

301-587-3109

Kelaginamane Thimmap Hiriyanna

Reg. 77302

Patent agent

Boyds, MD · 20841-4324

240-447-7021

An Hoang

Reg. 79008

Patent attorney

Silver Spring, MD · 20910

301-919-2318

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.