$VPLM News Article - The PTAB Denies Institution of All Four IPR Petitions filed by Amazon and T-Mobile; To Date VoIP-Pal.com Has Successfully Defeated 20 IPR Challenges Against 8 of its Patents by Amazon, T-Mobile, Google, Apple, AT&T and Unified Patents https://marketwirenews.com/news-releases/the-...25946.html