24 U.S.C. § 37 : US Code - Section 37: Manufacture of products by patients at naval hospitals; ownership of products

      The Secretary of the Navy is authorized to furnish materials for
    the manufacture or production by patients of products incident to
    the convalescence and rehabilitation of such patients in naval
    hospitals and other naval medical facilities, and ownership thereof
    shall be vested in the patients manufacturing or producing such
    products, except that the ownership of items manufactured or
    produced specifically for the use of a naval hospital or other
    naval medical facility shall be vested in the Government and such
    items shall be accounted for and disposed of accordingly.