definiens: means ( a ) worldwide rights to the inventions described and claimed in the patents, patent applications and invention disclosures listed in Exhibit A attached hereto ; any patents which issue on the applications or disclosures listed in E xhibit A ; reissues, reexaminations, additions, renewals, extensions, divisionals, continuations, and continuations -in - part of the foregoing ; and any foreign counterparts and any other forms of protection directed to the inventions covered by the patents, a pplications and invention disclosures listed in Exhibit A, and ( b ) all patent applications hereafter filed and owned by CALTECH which are dominated by a claim or claims of the patents or patent applications of part ( a ), together with any and all patents th at issue therefrom, and all related divisionals, continuations, continuations -in - part, reissues, renewals, reexaminations, extensions or additions to any such patents and patent applications and any foreign counterparts which hereafter arise as a result of work conducted at CALTECH solely or jointly in the laboratories of Dr