Ken Cohen is a retired partner in Goodwin's Litigation Department, concentrates his practice on products liability litigation and complex civil litigation. Mr. Cohen has particular experience in products liability class action issues, including “limited issue” class questions, class definition issues, constitutional limitations on class certification and medical monitoring issues.





Mr. Cohen has handled products liability litigation, especially involving prescription pharmaceutical drugs, for over 20 years. His work has included national counsel positions and arguments on behalf of large groups of defendants in mass tort situations. For example, Goodwin was counsel for Eli Lilly in litigation involving the synthetic estrogen DES. Mr. Cohen briefed and argued oppositions to class action certification in a number of jurisdictions in that litigation on behalf of Lilly and other pharmaceutical companies. He also briefed and argued in a number of jurisdictions, including the Eleventh Circuit, D.C. Circuit and several state supreme courts, the question of whether particular state law should include the “market share” theory of liability. Mr. Cohen, together with California counsel, tried the only two market share cases ever tried on the merits – two consolidated California DES cases. In market share litigation involving all DES claims filed in the New York state courts, Mr. Cohen was co-liaison counsel for over 40 defendant pharmaceutical companies.

Mr. Cohen has more recently been national counsel for CVS Pharmacy in Fen-Phen litigation. He argued on behalf of CVS and other pharmacies brought into the litigation the issue of pharmacists’ liability for allegedly defective drugs, in courts in New York, Connecticut and Massachusetts. In New York Fen-Phen litigation, Mr. Cohen acted as liaison counsel for all pharmacies.

In the asbestos property damage cases, Mr. Cohen represented W.R. Grace in the national school asbestos class in the Eastern District of Pennsylvania. He argued for all defendants in that litigation in the Third Circuit, and in addition was head of the committee of defense counsel that developed facts and legal arguments to decertify that class. He also briefed class issues in proposed national hospital class actions and university class actions in the asbestos property litigation.

Professional Experience

Mr. Cohen is a former associate professor at Boston University School of Law, where he taught, among other courses, Federal Courts and courses dealing with class actions.

He served as a law clerk for Judge Bailey Aldrich on the First Circuit Court of Appeals.


Mr. Cohen was a member of the Harvard Law Review while at Harvard Law School.

In The News









J.D., 1970
Harvard Law School
B.A., Mathematics, 1967
Harvard College

(cum laude)


1970 to 1971 U.S. Court of Appeals for the First Circuit, Honorable Bailey Aldrich





U.S. Supreme Court
U.S. Tax Court
U.S. Court of Appeals for the First Circuit
U.S. Court of Appeals for the Eleventh Circuit
U.S. Court of Appeals for the Federal Circuit
U.S. District Court for the District of Massachusetts
Profile Image
Get In Touch
Our clients rely on us for world-class advisory services, counsel on complex transactional work and high-stakes litigation. Specializing in matters involving the financial, life sciences, private equity, real estate, and technology industries, we use a collaborative, cross-disciplinary approach to resolve our clients’ most challenging issues. To find out more, please contact us.


Nos équipes interviennent aux côtés de nos clients, industriels, fonds d’investissement, startups, institutions financières et dirigeants, dans le cadre de transactions et de contentieux complexes, et apportent des conseils de tout premier plan dans les secteurs financiers, des Sciences de la Vie, du Private Equity, de l’immobilier et des technologies. Nous traitons les dossiers juridiques de manière intègre, ingénieuse, souple et audacieuse pour répondre efficacement aux enjeux propres à chacun de nos clients, quels que soient la taille de l’opération et le secteur d’activité. Pour en savoir plus, contactez-nous.

Unsere Kunden verlassen sich auf unsere erstklassige Beratung, vor allem im Hinblick auf komplexe Transaktionen und High-Stakes-Prozesse. Spezialisiert auf Angelegenheiten der Finanz-, Life-Sciences-, Private-Equity-, Immobilien-und Technologie-Branchen, verwenden wir einen kooperativen und interdisziplinären Ansatz, um Fragen unserer Kunden auch in extremen Spezialsituationen einer Lösung zuzuführen. Sie wollen mehr erfahren? Kontaktieren Sie uns gerne.

Search Other Lawyers
Recherche par Pratique