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