The owner of the patent affected by a declaration or a finding made by the Commission pursuant to subsection (b) or (e) of this section shall be entitled to a reasonable royalty fee from the licensee for any use of an invention or discovery licensed by this section. Such royalty fee may be agreed upon by such owner and the patent licensee, or in the absence of such agreement shall be determined for each patent license by the Commission pursuant to section
2187
(c) of this title.