35 USCS Sect. 187

U.S. Patent Act

..Part II. Patentabililty of Inventions and Grant of Patents

....Chapt. 17. Secrecy and Filing in Foreign Country

Sect. 187. Nonapplicability to certain persons

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.