definiens: means ( i ) with respect to each Compound in the Exon 51 Program, and ( ii ) with respect toeach Compound in a PROSENSA Collaboration Program for which [COMPANY] exercises the Option and receives rights uponexercise pursuant to Section 4.2 or by operation of the applicable provisions of Article 12, in the case of either ( i ) or(ii ) above shall include both ( a ) and ( b ) as follows : ( a ) any and all PROSENSA Know - How and Joint Know - How, ineach case that describes the composition of matter of or is necessary or useful for the making, use ( including methodof use ) or sale of such Compound, and ( b ) any and all PROSENSA Patent Rights and Joint Patent Rights, in each casethat claims or covers the composition of matter of or the making, use ( including method of use ) or sale of any suchCompound