781.71—Litigation.
(a)
An exclusive or partially exclusive licensee may be granted the right to sue at his own expense any party who infringes the rights set forth in his license and covered by the licensed patent. Upon a determination that the Government is a necessary party, the licensee may join the Government of the United States, upon consent of the Attorney General, as a party complainant in such suit. The licensee shall pay costs and any final judgment or decree that may be rendered against the Government in such suit. The Government shall have the absolute right to intervene in any such suit at its own expense.
(b)
The licensee shall be obligated to furnish promptly to the Government, upon request, copies of all pleadings and other papers filed in any such suit and of evidence adduced in proceedings relating to the licensed patent, including but not limited to, negotiations, agreements settling claims by a licensee based on a licensed patent, and all other books, documents, papers and records pertaining to such suit. If, as a result of any such litigation, the patent shall be declared invalid, the licensee shall have the right to surrender his license and be relieved from any further obligation thereunder.