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 Semequip, Inc., Chester Cekala, and K&L Gates LLP.

Top cities in Massachusetts

All practitioners in Massachusetts

Albert Patrick Cefalo

Reg. 27315

Patent attorney

Semequip, Inc.

N. Billerica, MA · 01862

978-987-2133

Chester Cekala· Jr

Reg. 32971

Patent attorney

Chester Cekala

Stow, MA · 01775

339-222-3507

Christopher Centurelli

Reg. 44599

Patent attorney

K&L Gates LLP

Boston, MA · 02111-2950

617-261-3100

Jeffrey M Cerio

Reg. 64280

Patent agent

Alkermes, LLP

Waltham, MA · 02451

781-609-6171

David J Cerveny

Reg. 44600

Patent attorney

ConforMIS, Inc.

Burlington, MA · 01803

781-345-9001

Richard R Cesati· III

Reg. 70792

Patent agent

Pepperell, MA · 01463

978-987-6505

Andrea M Cezeaux

Reg. 41662

Patent attorney

Cambridge Health Alliance

Cambridge, MA · 02139

617-503-8437

Karen Beutel Chadwell

Reg. 48531

Patent attorney

University of Massachusetts

Shrewsbury, MA · 01545

413-545-9399

Meenakshy Chakravorty

Reg. 68315

Patent attorney

Philips Intellectual Property & Standards

Burlington, MA · 01803

781-418-9211

Stanley F Chalvire

Reg. 57322

Patent attorney

Morse, Barnes-Brown & Pendleton, PC

Waltham, MA · 02451

781-622-5930

Thomas K Chamberlain

Reg. 64372

Patent attorney

Northborough, MA · 01532

774-258-0760

Cyril Ka Hong Chan

Reg. 66504

Patent agent

Andover, MA · 01810

978-807-6069

Karen K L Chan

Reg. 67082

Patent attorney

Conagen Inc.

Bedford, MA · 01730

781-271-1588

Kelvin W Chan

Reg. 71433

Patent agent

Revere, MA · 02151

Kevin K. Chan

Reg. 84693

Patent attorney

Cooley LLP

Boston, MA · 02116-3736

617-937-2300

Sherwin Y Chan

Reg. 75602

Patent attorney

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

Boston, MA · 02111

617-348-3037

Kevin B Chancellor

Reg. 80711

Patent attorney

Novartis BioMedical Research, Inc.

Cambridge, MA · 02139

857-523-0129

Hsuan-Yeh Chang

Reg. 73431

Patent attorney

Hsuanyeh Law Group, PC

Boston, MA · 02108

617-886-9088

Hsun-Hsien Chang

Reg. 73242

Patent agent

Brookline, MA · 02445

412-519-4978

Robert Chang

Reg. 63753

Patent attorney

Amylyx Pharmaceuticals, Inc.

Cambridge, MA · 02141

857-847-2079

Zhiheng Chang

Reg. 82898

Patent agent

Mintz

Boston, MA · 02111

617-542-6000

Jessica J Chao

Reg. 72562

Patent attorney

Takeda Pharmaceuticals U.S.A., Inc.

Cambridge, MA · 02139

617-761-6860

Barry Wisner Chapin

Reg. 39934

Patent attorney

Chapin Intellectual Property Law LLC

Southborough, MA · 01772

508-616-9660

Brian R Chase

Reg. 56663

Patent attorney

Gunderson Dettmer Stough Villeneuve Franklin & Hachigan, LLP

Waltham, MA · 02451

781-795-3535

Paromita Chatterjee

Reg. 63721

Patent attorney

Hologic, Inc.

Marlborough, MA · 01752

508-263-8448

Alexander J. Chatterley

Reg. 76844

Patent attorney

Foley Hoag LLP

Boston, MA · 02210

617-832-1786

David A. Chavous

Reg. 66047

Patent attorney

Wilmer Cutler Pickering Hale and Dorr LLP

Boston, MA · 02109

617-526-6323

Kathryn V Chelini

Reg. 52723

Patent attorney

Chelini IP Law LLC

Westborough, MA · 01581

508-983-1490

Kristine N. Cheloha

Reg. 80345

Patent agent

Dana-Farber Cancer Institute, Inc.

Boston, MA · 02215

206-790-7830

Chen Chen

Reg. 73384

Patent attorney

Fenwick & West LLP

Boston, MA · 02116

617-245-5801

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.