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 Finnegan, Henderson, Farabow, Garrett & Dunner, LLP, Goodwin Procter LLP, and SciTech Accelerator Group, LLC.

Top cities in Massachusetts

All practitioners in Massachusetts

Seok Jun Han

Reg. 73049

Patent agent

Andover, MA · 01810

224-766-0217

Xue Han

Reg. 78055

Patent agent

SciTech Accelerator Group, LLC

Winchester, MA · 01890

781-518-8119

Gaozhen Hang

Reg. 79667

Patent attorney

Siemens Healthcare Diagnostics Inc.

Norwood, MA · 02062

302-333-8125

James M Hanifin· Jr

Reg. 39213

Patent attorney

Wolf, Greenfield & Sacks, P.C.

Boston, MA · 02210-2206

617-646-8000

Elizabeth Ann Hanley

Reg. 33505

Patent attorney

McCarter & English, LLP

Boston, MA · 02110

617-449-6500

Cindy S Hanna

Reg. 65030

Patent agent

Greenlight Biosciences, Inc

Medford, MA · 02155

781-827-4523

Michael Richard Hanna

Reg. 37636

Patent attorney

West Roxbury, MA · 02132

617-323-3945

Steven F Hannigan

Reg. 80498

Patent attorney

Wolf Greenfield & Sacks

Boston, MA · 02210

617-646-8573

Arne Hans

Reg. 72846

Patent attorney

Hans Law PLLC

Lunenburg, MA · 01462

978-403-0045

Mark J Hanson

Reg. 62521

Patent attorney

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Boston, MA · 02210

857-330-9992

Junjie Hao

Reg. 81782

Patent agent

Clark & Elbing

Boston, MA · 02110

617-428-0200

John T Haran· III

Reg. 58010

Patent attorney

Cabot Corporation

Billerica, MA · 01821

978-670-6922

David S. Harburger

Reg. 65159

Patent attorney

Greenberg Traurig LLP

Boston, MA · 02110

617-310-5267

Mark M. Harden· Jr

Reg. 81537

Patent agent

Goodwin Procter LLP

Boston, MA · 02210

617-570-8217

Edgar W Harlan· Jr

Reg. 42632

Patent agent

Elmore Patent Law Group, P.C.

Westford, MA · 01886

978-251-3509

Gitrada A Harmon

Reg. 65996

Patent attorney

Amgen Inc.

Cambridge, MA · 02142

617-444-5614

John S Harmon· III

Reg. 67131

Patent attorney

Wolf, Greenfield & Sacks P.C.

Boston, MA · 02210

617-646-8307

John A Harre

Reg. 37345

Patent attorney

Intarcia Therapeutics, Inc.

Boston, MA · 02210

617-936-2542

Robert M Harrington

Reg. 54153

Patent agent

Duxburg, MA · 02332

781-319-0530

Ariana D. Harris

Reg. 73600

Patent attorney

Foley Hoag LLP

Boston, MA · 02210

617-832-1141

Jana E Harris

Reg. 61581

Patent attorney

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Boston, MA · 02210

617-871-8000

Kimya F Harris

Reg. 57172

Patent agent

KSQ Therapeutics

Cambridge, MA · 02139

617-548-0858

Nathan T Harris

Reg. 66451

Patent attorney

Proskauer Rose LLP

Boston, MA · 02110

617-526-9600

Celia J. Harrison

Reg. 60954

Patent attorney

Boston University

Boston, MA · 02215

617-358-4208

Nathan D. Harrison

Reg. 73050

Patent attorney

Thermo Fisher Scientific, Inc.

Waltham, MA · 02451

781-296-4858

Julia Dawn Hart

Reg. 33132

Patent attorney

Princeton, MA · 01541

978-464-2499

George William Hartnell· III

Reg. 42639

Patent attorney

Goodwin Procter LLP

Boston, MA · 02210

617-570-3914

Shahid Hasan

Reg. 67231

Patent attorney

PLATELET BIOGENESIS INC

Watertown, MA · 02472

617-835-4117

Thomas Anthony Hassing

Reg. 36159

Patent attorney

Commonwealth Fusion Systems

Devens, MA · 01434

408-431-7069

Allyson R Hatton

Reg. 54154

Patent attorney

SANOFI

Cambridge, MA · 02141

508-361-7392

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.