definiens: means any patented modiﬁcation, alteration or improvement of any invention claimed in a Patent and which is conceived of orreduced to practice by one or more employees or agents ( including, without limitation, consultants or contractors ) of CHMC after the Eﬀective Date and isassigned to CHMC, and excluding any Joint Improvements as deﬁned in Section 7.7 . CHMC Improvements will not be included in the license grants setforth in this Agreement . Provided that a CHMC Improvement is not encumbered by an agreement with a third party that would preclude so adding it, CHMC hereby grants to Company an exclusive option to add CHMC Improvements to the license rights granted in this Agreement for sixty ( 60 ) daysafter Company has been notiﬁed of the existence of each such CHMC Improvement under Paragraph 7.4 ( an ) . CHMC will notifyCompany in writing of the option fee, as indicated in section 8.3, and patent costs to be reimbursed by Company, if any, as determined by CHMC, to addsuch CHMC Improvement . Company may exercise its option to add such CHMC Improvement by providing CHMC, within the relevant Option Period, with written notiﬁcation of Company 's desire to so add the CHMC Improvement and paying CHMC the option fee and patent costs for each CHMCImprovement so added, in which case, such CHMC Improvement will be subject to the same restrictions, limitations, warranty disclaimers, andobligations herein as the Patents, including, without limitation, the payment of Running Royalties