definiens: means, on a Licensed Product - by - Licensed Product and country - by - country basis, the period commencing upon the Fi rst Commercial Sale of a Licensed Product in such c ountry and ending upon the latest to occur of : ( a ) the dat e of expiration of the last Valid Patent Claim of t he MTEM Background Patent Rights, the Patent Rights in the Joint Background IP, the MTEM Program Patent Rights, the Takeda Program Patent Rights ( other than any Takeda Targeting Moiety IP ) and the Product Program Paten t Rights, in each case that would be infringed by the sale of the applicable Licensed Product in the app licable country, if not for Takeda ’s ownership thereof or t he licenses granted hereunder ; ( b ) the date of expi ration of any regulatory exclusivity for such Licensed Product in such country ; and ( c ) [ * * * ] from the First Commerc ial Sale of such Licensed Product in such country