definiens: means ( a ) any Display System created byPFIZER in accordance with this agrcement after the Effective Date ; ( b ) any Display System cre - ated by a Third Party pursuant to a valid and effective license under the Patent Rights permittingthe creation, use and transfer of such Display System and/or ( c ) those Display Systems currentlyin the possession of PFIZER . No Display System shall be deemed to be a PFIZER Display Sys - tem unless : ( a ) PFIZER 's control, use and possession of such PFIZER Display System is permit - ted by ( i ) the applicable Third Party license from XOMA referred to in clause ( b ) above, ( If(ii)this Agreement, and ( b ) such PFIZER Display System is used exclusively by PFIZER or its Af - filiates . For the avoidance of doubt, the applicable terms of any license covering a PFIZER Dis - play System referred to in clause ( b ) of this Section 1.24 shall also apply to PFIZER 's activitieshereunder