definiens: means any challenge to the [ * * * ] or [ * * * ] of any of the Licensed Patent Rights, includingwithout limitation : ( a ) filing a declaratory judgment action in which any of the Licensed Patent Rights is alleged to be invalidor unenforceable ; ( b ) citing prior art pursuant to 35 U.S.C. § 122 or § 301, filing a request for re - examination of any of theLicensed Patent Rights pursuant to 35 U.S.C. § 302 or § 311, filing a [ * * * ] of the Licensed Patent Rights pursuant to [ * * * ], orfiling a [ * * * ] of the Licensed Patent Rights pursuant to [ * * * ] ; or ( c ) filing or commencing any re - examination, opposition, cancellation, nullity or similar proceeding against any of the Licensed Patent Rights in any country