John J. Cahill Jr.

John J. Cahill Jr.


Boston, MA
Phone: 617.204.5130    Fax: 617.204.5150

John (Jay) Cahill, Jr. is an associate in the Intellectual Property Department of Pepper Hamilton LLP, resident in the Boston office. His practice covers all aspects of intellectual property law, including intellectual property protection and complex intellectual property disputes.

Dr. Cahill provides strategic counsel in varied fields of technology, such as biologically active materials, medical devices, nanotechnology, small molecule pharmaceuticals, semiconductor materials, photonics/optics, software system and computer-implemented methods, and fuel cells. Dr. Cahill advises clients with a firsthand, practical understanding of technology, engineering and management to assist clients in achieving their goals. With nearly 15 years of experience as a scientist and engineer, with great emphasis on product development, Dr. Cahill provides a wide-ranging technical skill set and knowledge. He excels at combining his technical expertise and a sophisticated business understanding to provide innovative solutions for clients.

Dr. Cahill focuses on preparation and prosecution of patent and trademark applications; performing opinion drafting and counseling assessing patent validity, infringement, freedom to operate and patentability of inventions; and due diligence and strategic assessment of patent portfolios.

Dr. Cahill also represents clients in all aspects of patent litigation before the U.S. Patent Office and in federal court, along with advising litigation teams on technical scientific concepts.

Before attending law school, Dr. Cahill spearheaded design and development of semiconductor diode-based laser systems for medical/surgical device applications. In this capacity, Dr. Cahill worked with customers on design and development while managing manufacture, testing and long-term reliability studies for commercial deployment. He has extensive experience with development and operation of MBE and MOCVD systems and a wide variety of semiconductor processing and laser test equipment. Dr. Cahill also gained valuable experience drafting FDA 510(k) regulatory submissions.

As a graduate student and post-doctoral research associate, Dr. Cahill earned knowledge and expertise in the chemistry of materials, deposition and characterization of III-V semiconductors and metals, UHV, optics and lasers. He also led a SmithKline Beecham-funded study of Tamoxifen.

Dr. Cahill is an inventor on United States Patent Nos. 7,660,335 and 7,944,955.

Dr. Cahill previously practiced law in the intellectual property department at several well-respected law firms.


  • J.D., Seton Hall University School of Law, 2010
  • Ph.D., Chemistry, Tulane University, 1999
  • M.B.A., Loyola University, New Orleans, 1998
  • B.A., Biochemistry, Saint Anselm College, 1994

Bar Admissions

  • Massachusetts
  • New York
  • U.S. Patent and Trademark Office

Practice Areas

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