definiens: means, with respect to each country in which a given Product is sold, on a country by country and Product by Product basis, that time period beg inning on the First Commercial Sale of such Product in such country and expiring on the latest of the following dates : ( a ) the [ ] * anniversary of the date of First Commercial Sale of such Product in such country ; ( b ) the expiration in such country of the last -to - expire issued patent included within [COMPANY] Patents, even if such [COMPANY] Patents are filed by the Company as provided in Section 6.1(x ) or are assigned to Company as provided in S ection 6.4 ( but excluding any [COMPANY] Patent so assigned to Company that, in accordance with the provisions of Section 6.4, shall thereafter cease to be treated as a [COMPANY] Patent for purposes of this Agreement ), having a Valid Claim covering the sale of such Product in such country ; and * CONFIDENTIAL TREATMENT REQUESTED