definiens: means, on a country - by - country and product / service - by - product / service basis, the period commencing on the Effective Date and ending on thelater of : ( a ) the expiration of the last Valid Claim within the Patent Rights Covering theLicensed Product or Licensed Service or ( b ) the tenth ( 10 ) anniversary of the date of theFirst Commercial Sale of the Licensed Product, Licensed Service, Enabled Product orEnabled Service ; provided that, for any Enabled Product or Enabled Service that was aLicensed Product or Licensed Service, the date of the First Commercial Sale in clause(b ) shall be deemed to be the earlier of ( i ) the date of First Commercial Sale of theEnabled Product or Enabled Service that was a Licensed Product or Licensed Serviceand ( ii ) the date of the First Commercial Sale of the Licensed Product or LicensedService that became such Enabled Product or Enabled Service