Tag Archives: Westinghouse Elec. & Mfg. Co. v. Formica Insulation Co.

SCOTUS Opinion: Court Narrows Application Of Assignor Estoppel In Patent Cases

The doctrine of assignor estoppel precludes the assignor of a patent from later challenging the validity of that patent, under the premise that doing so is not fair dealing. In Minerva Surgical, Inc. v. Hologic, Inc., the developer of a patent treating abnormal uterine bleeding through a moisture-permeable applicator head gave the patent to his company, Hologic, then left and ... Read More