Massachusetts

Patent attorneys in Massachusetts

Massachusetts hosts 2,875 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 Applied Materials, Inc., Foley Hoag LLP, and Law Offices Of Edmund F Chojnowski.

Top cities in Massachusetts

All practitioners in Massachusetts

Changhoon Choi

Reg. 56798

Patent attorney

Applied Materials, Inc.

Gloucester, MA · 01930

978-282-5915

Charles P. Choi

Reg. 76821

Patent attorney

Boston, MA · 02210

617-646-8641

Philip S Choi

Reg. 65244

Patent attorney

Foley Hoag LLP

Boston, MA · 02210

617-832-1743

Sammuel Choi

Reg. 84425

Patent agent

Boston, MA · 02215

617-487-3154

SiKyung Choi

Reg. 75579

Patent agent

Amherst, MA · 01002

562-714-4117

Edmund F Chojnowski

Reg. 30825

Patent attorney

Law Offices Of Edmund F Chojnowski

Sterling, MA · 01564

978-422-3435

Nilay J. Choksi

Reg. 65795

Patent attorney

Philips

Cambridge, MA · 02141

617-312-9995

Siew Y Chong

Reg. 62108

Patent attorney

Sanofi

Cambridge, MA · 02139

973-980-0397

Padma Choudry

Reg. 60262

Patent attorney

Nutter McClennen & Fish LLP

Boston, MA · 02210-2604

617-439-2000

Stephen Yee Chow

Reg. 31338

Patent attorney

Hsuanyeh Law Group PC

Boston, MA · 02108

617-886-9288

Rebecca C. Christon

Reg. 71239

Patent attorney

Olympus Corporation

Westborough, MA · 01581

978-457-5907

Lesley P Chuang

Reg. 70795

Patent attorney

DLA Piper LLP

Boston, MA · 02110

617-406-6088

Matthew L. Chun

Reg. 77763

Patent attorney

Fish & Richardson P.C.

Boston, MA · 02210

617-521-7021

Christopher H Chung

Reg. 50351

Patent attorney

Sanofi Pasteur

Cambridge, MA · 02139

617-761-4332

Sergio F Chung

Reg. 66166

Patent attorney

Johnson & Johnson

Raynham, MA · 02767

978-538-8523

Sharon H Church

Reg. 55074

Patent attorney

Charlestown, MA · 02129

617-818-4397

Christopher J Cianciolo

Reg. 42417

Patent attorney

Tyco International

Westford, MA · 01886

978-577-4198

Regina Ann Ciolek

Reg. 50641

Patent attorney

Fulcrum Therapeutics, Inc.

Cambridge, MA · 02142

617-870-9345

Tara C Clancy

Reg. 40935

Patent attorney

K&L Gates LLP

Boston, MA · 02111-2950

617-261-3100

Francis J Clark

Reg. 32208

Patent attorney

Brockton, MA · 02301

508-587-7035

Geneva L Clark

Reg. 51046

Patent attorney

DT Ward PC

Groton, MA · 01450

978-448-8720

Paul T Clark

Reg. 30162

Patent attorney

Clark & Elbing LLP

Boston, MA · 02110

617-428-0200

Robert F Clark

Reg. 33853

Patent attorney

Osram Sylvania INC

Danvers, MA · 01923

978-750-2275

Thomas J Clark

Reg. 54039

Patent attorney

HUNTER CLARK PLLC

Newburyport, MA · 01950

617-830-5440

Daniel W Clarke

Reg. 63993

Patent attorney

ArentFox Schiff LLP

Boston, MA · 02199

617-973-6217

Marcie B. Clarke

Reg. 63723

Patent attorney

McCarter & English, LLP

Boston, MA · 02110

617-449-6500

Lauren A Cleary

Reg. 51139

Patent attorney

McCarthy Bouley and Barry PC

Cambridge, MA · 02142

617-225-2211

James D Clements

Reg. 61195

Patent attorney

Goodwin Procter LLP

Boston, MA · 02109

617-570-1000

Katherine Nicole Clouse

Reg. 62750

Patent attorney

Biogen Inc.

Cambridge, MA · 02138

617-823-2236

Mario Cloutier

Reg. 57225

Patent agent

Millennium Pharmaceuticals, Inc.

Cambridge, MA · 02139

617-577-3522

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?

2,875 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.