the United States Government

“ The failure to perform any acts described in the preceding sentence is evidence of absence of good faith unless there are mitigating circumstances. Mitigating circumstances include the case in which, due to the nature of the product, the number of sources for the product, or like commercial circumstances, a request for disclosure is not necessary or practicable to avoid infringement. ”

“ For purposes of this subsection, a person who obtains a product made by a process patented in the United States in a quantity which is abnormally large in relation to the volume of business of such person or an efficient inventory level shall be rebuttably presumed to have actual knowledge that the product was made by such patented process. ”

“ The Public Health Service Act, referred to in subsec. (c) (3) (B) , is act July 1, 1944, ch. 373, 58 Stat. 682, as amended, which is classified generally to chapter 6A (Sec. 201 et seq.) of Title 42, The Public Health and Welfare. ”