definiens: shall mean : ( a ) all patents and patent applications owned or controlled by Licensor, or licensed to Licensor with rights to grant sublicenses thereunder, anywhere in the world as of the date hereof or at any time hereafter relatmg to the Field of Use and which are ( i ) listed on Schedule A, ( ii ) issued, assigned or licensed to Licensor at any time hereafter and that are necessary or useful for the making, using or selling of Licensed Products as provided in this Agreement, or ( iii ) based on any Inventions that are necessary or useful for the making, using or selling of Licensed Products as provided in this Agreement, and ( b ) any improvement patents, reissues, confirmations, renewals, extensions, counterparts, divisions, continuations, continuations - in - part or patent - of - addition issued, assigned or licensed to Licensor of or relating to the patents or patent applications described in clause ( a ) hereof