Nathan Clifford

“ Applicants for a patent are as much required to describe the manner and process of making, constructing, and using the invention, as they are to file in the Patent Office a written description of the alleged improvement; and both are expressly required to be in such full, clear, concise, and exact terms, as to enable any person skilled in the art or science to make, construct, and use the invention. ”

“ Power to grant letters-patent is vested in the commissioner; but when the power is exercised and the patent has been duly granted, it is of itself prima facie evidence that the patentee is the original and first inventor of that which is therein described and secured to him as his invention. ”