The Federal Circuit recently issued a decision in the ongoing dispute in Kroy IP Holdings, LLC v. Groupon, Inc., addressing the collateral estoppel effect of Patent Trial and Appeal Board (PTAB) decisions on subsequent...more
A recent ruling from the Patent and Trial Appeal Board (PTAB) highlights the critical role that collateral estoppel (also known as issue preclusion) can play in inter partes review (IPR) proceedings. In a final written...more
The Federal Circuit recently affirmed final written decisions in two inter partes reviews by holding that the patent owner was collaterally estopped from relitigating the threshold issue of whether a prior art reference was a...more