March 02, 2021
The federal government and several intellectual property law groups have urged the U.S. Supreme Court to limit the doctrine of assignor estoppel, which bars those who sell or assign patents to others from challenging their validity, saying it is used too often.
February 23, 2021
Minerva Surgical Inc. is arguing that the assignor estoppel doctrine, which bars inventors who sell their patent rights from challenging the patent's validity in district court, is "uncommonly lawless" and should be abolished by the U.S. Supreme Court.
January 12, 2021
A case recently taken up by the U.S. Supreme Court has the potential to create more opportunities for accused infringers to try to invalidate patents in court by allowing attacks in the relatively unusual situation where the challenger is the patent's inventor, attorneys say.
January 08, 2021
The U.S. Supreme Court on Friday agreed to hear a case calling for the abolition of the doctrine of assignor estoppel, which bars inventors who sell their patent rights from challenging the patent's validity in district court.
October 08, 2020
Minerva Surgical Inc. has asked the U.S. Supreme Court to abolish the doctrine of assignor estoppel, which bars inventors who sell their patent rights from challenging the patent's validity in district court.