According to Ryan Davis’s Law360 article, "Merck Supplement Patents Nixed in 1st Pharma AIA Reviews," “only about 6 percent of the AIA petitions filed to date have challenged pharmaceutical patents,” making this possibly the “first inter partes review involving pharmaceuticalrelated patents.”
Gnosis S.P.A. v. South Alabama Medical Science Foundation, IPR201300116, IPR201300118 & IPR201300119 (PTAB June 20, 2014) [Kamholz (opinion); Bonilla; Snedden]; Gnosis, S.P.A. v. Merck & CIE, IPR20130017 (PTAB June 20, 2014) [Kamholz (opinion); Bonilla; Snedden].