In its recent decision in RØDE Microphones, LLC et. al. vs. Zaxcom, Inc., the PTAB declined to apply collateral estoppel based on prior ...

A district court judge recently addressed the scope of estoppel for a petitioner in an inter partes review (IPR). Specifically, the court clarified the meaning of a “ground for invalidity” as it ...

Based upon recent case pronouncements by both New York's highest court and federal courts, the doctrine of promissory estoppel should be invoked with selectivity, particularly when used to undermine ...

March 20, 2025 - In February 2025, the U.S. Court of Appeals for the Federal Circuit clarified when collateral estoppel might apply in a district court case following an invalidity determination by ...

The Supreme Court on Tuesday issued its opinion in Minerva Surgical Inc. v. Hologic Inc. The case sought to abolish the doctrine of patent assignor estoppel, which prohibits an inventor from ...

The Pennsylvania Supreme Court has ruled that the Coatesville Area School District should not have been barred from a merits resolution of its appeal of a tax assessment on the bases of res judicata ...

In a five to four ruling, the US Supreme Court upheld the doctrine of assignor estoppel but said it could only be used in certain instances The US Supreme Court upheld the doctrine of assignor ...

March 24, 2022 - Patent Trial and Appeal Board post-grant validity challenges — for example, inter partes reviews (IPR) — are frequent components of a patent litigation strategy. However, filing an ...

The Patent Trial and Appeal Board’s October 2013 decision determining that the doctrine of assignor estoppel is not an exception to Section 311(a) is the ninth to be deemed precedential The PTAB has ...

The 2024 election is inevitably headed to the Supreme Court. The Trump legal team plans to appeal the Colorado Supreme Court’s judgment this week that Donald Trump is not a constitutionally valid ...

The Supreme Court on Tuesday narrowed the doctrine of patent assignor estoppel, which prohibits an inventor from assigning a patent to someone and then later contending in litigation that the patent ...