definiens: or, unless otherwise specified, shall mean any and all patents and patentapplications listed in both Appendix and Appendix hereto ( Appendix and Appendix may be added to butnot subtracted from without mutual consent from time to time by USC and USC shall notify Licensee of any suchadditions ), any patent applications covering an Improvement, any and all patents issued therefrom or any divisions, continuations, continuations - in - part ( only to the extent that valid claims in the continuation in part applications areentirely supported in the specification and entitled to the priority date of the parent application division),reexaminations, extension or reissue thereof and any and all foreign patents issuing from any application filed whichcorresponds to claims contained in any of the foregoing patents or applications . When referring to only the patents inAppendix or the patents in Appendix, the terms or will be used