U.S. Patent Act
..Part II. Patentabililty of Inventions and Grant of Patents
....Chapt. 17. Secrecy and Filing in Foreign Country
The prohibitions and penalties of this chapter [35 USCS Sects. 181 et seq.] shall not apply to any officer or agent of the United States acting within the scope of his authority, nor to any person acting upon his written instructions or permission.