Massachusetts

Patent attorneys in Massachusetts

Massachusetts hosts 2,869 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 Massachusetts. 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 Merck, Wolf Greenfield, and Choate, Hall & Stewart LLP.

Top cities in Massachusetts

All practitioners in Massachusetts

Andrew W Custer

Reg. 56854

Patent attorney

Merck

Boston, MA · 02115

617-992-3581

William L. Czaplyski

Reg. 76669

Patent attorney

Wolf Greenfield

Boston, MA · 02210

617-646-8494

Erica M D'Amato

Reg. 77683

Patent attorney

Choate, Hall & Stewart LLP

Boston, MA · 02110

617-248-4025

Andrew Thomas D'Amico· Jr

Reg. 33375

Patent attorney

Vicor Corp.

Andover, MA · 01810

978-749-3230

Joseph J. D'Angelo

Reg. 56800

Patent attorney

Acacia Communications

Maynard, MA · 01754

508-251-9426

Daniel P Dacey

Reg. 78383

Patent agent

Caldwell Intellectual Property Law, LLC

Boston, MA · 02110

978-270-5271

David A Dagg

Reg. 37809

Patent agent

Bainwood Huang & Associates LLC

Westborough, MA · 01581

508-616-2900

Jana A Dailey

Reg. 71310

Patent attorney

Blueprint Medicines

Cambridge, MA · 02139

858-349-3454

Sean P Daley

Reg. 40978

Patent attorney

Fish & Richardson P.C.

Boston, MA · 02110-1878

617-542-5070

Rebecca L Dalpe

Reg. 55866

Patent attorney

Foster & Eldridge, LLP

Woburn, MA · 01801

617-252-3366

Christopher S Daly

Reg. 37303

Patent attorney

Daly, Crowley, Mofford & Durkee LLP

Quincy, MA · 02169

781-401-9988

Laura A Daly

Reg. 80674

Patent agent

Seurat Technologies

Wilmington, MA · 01887

512-487-9048

Puthikratanak Dam

Reg. 84043

Patent agent

Worcester, MA · 01602

508-897-7545

Marta G Daneshvar

Reg. 76631

Patent attorney

Boston, MA · 02110

617-248-5138

Justin J. Daniels

Reg. 58141

Patent attorney

Proskauer Rose LLP

Boston, MA · 02110

617-526-9600

McKendra Darbey

Reg. 83407

Patent attorney

Caldwell Law

Boston, MA · 02116

802-848-6055

Dennis M Darcy

Reg. 55098

Patent agent

Dennis M. Darcy

Wilmington, MA · 01887

978-944-2302

James Dana Darnley· Jr

Reg. 33673

Patent attorney

Radius Health, Inc.

Waltham, MA · 02451

617-551-4079

Michael R. Das

Reg. 83327

Patent agent

Clark+Elbing

Boston, MA · 02110

617-428-1183

Indrani Dasgupta

Reg. 72475

Patent attorney

Sanofi

Cambridge, MA · 02141

617-685-5977

Suparna Datta

Reg. 63616

Patent attorney

Mintz, Levin, Cohn, Ferris, Glovsky, and Popeo, P.C.

Boston, MA · 02111

617-348-4405

Dana M Daukss

Reg. 77965

Patent agent

Choate Hall and Stewart LLP

Boston, MA · 02110

617-248-5124

Brian C Dauphin

Reg. 40983

Patent attorney

Dauphin Law Offices

Andover, MA · 01810

617-749-9800

Andrew M. Davenport

Reg. 75864

Patent agent

Goodwin Procter, LLP

Boston, MA · 02210

617-570-8138

Christopher J. Davies

Reg. 73243

Patent agent

Ayer, MA · 01432-1776

978-337-9412

Ioana Davies

Reg. 75817

Patent agent

Goodwin LLP

Boston, MA · 02210

617-570-3920

Chad E Davis

Reg. 56179

Patent attorney

Dechert LLP

Boston, MA · 02210

617-728-1000

Jessica L Davis

Reg. 48736

Patent attorney

Patent GC

Boston, MA · 02110

617-866-8908

Patricia Ann Davis

Reg. 37866

Patent attorney

Consultant

BOXBOROUGH, MA · 01719

781-953-2330

Steven G Davis

Reg. 39652

Patent attorney

McCarter & English LLP

Boston, MA · 02110

617-449-6580

Common questions

Do I need a patent attorney based in Massachusetts?

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 Massachusetts-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 Massachusetts?

2,869 active USPTO-registered patent practitioners list a Massachusetts 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.