1 Microsoft: "Our software patents preclude interoperability"

Carlo Piana, Free Software Foundation Europe's lawyer on the case explains: "The interventions made perfectly clear that the Blue Bubble only existed in the lawyers' pleadings. Meanwhile, Microsoft left no doubt as to the legal nature of that Bubble: a conglomerate of 46 patents that it claims it holds on ADS, whose main effect is to prevent interoperability and, eventually, competition."

https://lists.fsfe.org/pipermail/press-release/2006q2/000138.html