definiens: means, collectively:(a ) which means Know - How that ( i ) is Controlled by CELGENE or anyof its Affiliates as of the Effective Date or thereafter during the Term, ( ii ) arises outside of the Collaboration, ( iii ) is providedby CELGENE to the Collaboration for the Parties ’ research, Development, Manufacture or Commercialization of Compounds(including Licensed Compounds ), Licensed Products or Diagnostic Products and ( iv ) is necessary for the research, Development, Manufacture or Commercialization of Compounds ( including Licensed Compounds ), Licensed Products andDiagnostic Products in the Field ; excluding any and all Know - How that is Chemistry IP ; and(b ) which means Patents Controlled by CELGENE or any of its Affiliates asof the Effective Date or thereafter during the Term that Cover CELGENE Background Know - How ; excluding any and allChemistry IP