Areas of Practice

John Kenneth Felter has been a trial attorney for over forty years and has tried numerous cases to conclusion in federal and state courts throughout the United States. He is a Fellow of the American College of Trial Lawyers. Ken has also frequently presented oral arguments before federal and state appellate courts. He is now a retired partner in Ropes & Gray's intellectual property litigation practice group and the firm's litigation department and focuses his practice in the areas of intellectual property and complex commercial litigation.


Ken leads tutorials in the Economics Department at Harvard College on Applying Economic Theory in the Practice of Law and has been a member of the Teaching Faculty of the Harvard Law School Trial Advocacy Workshop. He also teaches inter-disciplinary seminars at Boston College: Thinking About Law and Economics (and Psychology).


Ken was selected as a Fellow (2016) and Senior Fellow (2017) at the Advanced Leadership Initiative (ALI) at Harvard University. He was also named as a 2016-2017 Fellow by the Massachusetts Access to Justice Commission and now serves on its Revenue Enhancement Committee.


Idenix v. Gilead: Patent infringement litigation concerning treatment of hepatitis C.


<p">athenahealth, Inc. v. ADP AdvancedMD, Inc.: Patent infringement litigation concerning computerized methods for managing a medical practice.</p">


Verisign, Inc.: Analyses of United States and European patent portfolios.


Micro Motion v. Krohne: Patent infringement litigation concerning intrinsically safe meter electronics for Coriolis mass flowmeters.


NAACP v. Galvin: National Voter Registration Act of 1993 litigation regarding voter registration and services at Massachusetts public assistance offices.


Lincoln National v. Transamerica: Patent infringement litigation concerning computerized methods for administering variable annuity plans. See 609 F.3d 1364 (Fed. Cir. 2010).


Freedom Wireless v. Cingular Wireless: Patent infringement litigation concerning prepaid wireless communications. See amicus curiae brief in BMC Resources v. Paymentech, 498 F.3d 1373 (Fed. Cir. 2007) (legal standard for joint infringement by multiple parties).


In re Textile Rental Litigation: Coordinated national class action litigation concerning alleged unfair and deceptive trade practices in garment rental industry.


Wheelabrator Claremont v. City of Claremont: Litigation concerning municipality's attempt to take waste-to-energy facility by eminent domain.


Boston Professional Hockey Ass'n v. Commissioner of Revenue: Litigation concerning challenge to interpretation of state tax regulations governing apportionment of income earned in multi-jurisdictional transactions. See 443 Mass. 276 (2005).


Boston Police Patrolmen's Ass'n v. City of Boston: Litigation concerning defense to First Amendment challenge to Boston Garden policy governing access during Democratic National Convention.


Frankston v. Denniston: Litigation concerning defense in legal malpractice action involving standard governing predecessor counsel. See 74 Mass. App. Ct. 366 (2009).