That is complete baloney sliced too thin & nobody buying. The IPRs had absolutely no bearing on whether vplm is a patent troll or not. You are conflating 2 different aspects. Vplm is indeed a patent troll simply because it bought the patents, did not create them & then after promising to fold the tech into their so called Voip platform, instead reneged and have been suing ever since. That is the definitive patent troll, period! Nothing you say can change that FACT!
The IPRs also did NOTHING for the patents aside from successfully defend their already fully existing validity (from day 1) from a challenge. After the rulings (from a thoroughly corrupt ptab) vplm were left with the same validations it had all along. The possible addition of "estoppel" has, to my knowledge, never been used, therefore nothing gained, nothinhg lost.
Indisputable