definiens: shall mean : ( a ) any patent listed in Exhibit D ; ( b ) any patent application listed in Exhibit D, and any division, continuation, or continuation - in - part of any such -7-<PAGE > application, and any patent which shall issue based on such application, division, continuation or continuation - in - part ; ( c ) any patent which is a reissue or extension of or a patent ofaddition to, any patent defined in ( a ) or any application maturing into a patentdefined in ( b ) above ; ( d ) any patent application or patent corresponding to any patentapplication or patent identified in ( a ), ( b ) or ( c ) above which is hereafterfiled or issued in any country ; and ( e ) any patent application related to or based on any of AMGEN'stechnical information developed in the LICENSED FIELD during the performance ofthis AGREEMENT, and any division, continuation or continuation - in - part of anysuch application ; and any patent which shall issue based on such application, division, continuation or continuation - in - part ; and any patent which is areissue or extension of, or a patent of addition to, any such patent