Rooted in the principle of fairness, the doctrine of assignor estoppel generally prevents an inventor, who had previously assigned their patent rights to another for value, from later contesting the ...

Assignor estoppel survived the Supreme Court’s decision in Minerva Surgical Inc. v. Hologic Inc., but the Court’s clarification requires diligence and presents opportunities. Review patent assignment ...

David McCombs and Jonathan Bowser of Haynes Boone examine a recent Federal Circuit decision holding that IPR estoppel does ...

Jim Brogan, Brian Eutermoser and Janna Fischer discuss the ways that the unsuccessful IPR petitioner at the Patent Trial and Appeal Board still can challenge validity in subsequent district court ...