definiens: ( a s hereinafter defined ) owned by Licensor ; WHEREAS, Licensor is a successor to certain patent rights of Behringwerke Aktiengesellschaft, which previously entered into a Cross License Agreement with Hoechst Japan, Ltd. and Licensee relating to Factor XIII dated May 3, 1993 regarding certain patents and patent applications o wned or controlled by Licensee and certain patents and patent application s within the Licensed Patents owned or controlled by Licensor ( ) ; WHEREAS, Licensor is the present owner or ex clusive licensee of the Licensed Patents ; WHEREAS, Licensee desires to modify certain licenses granted under the Cross License Agreement as such licenses relate to Licensor and Licensee and obtain from Licensor an exclusive worldwide license under the Licensed Patents in the Field of Use for Licensed Products in accord ance with the terms of this Agreement ; * * * * designates portions of this document that have been omitted pursuant to a request for confidential treatment filed separately with the commission