John Marshall,
Grant v. Raymond — Opinion of the Court
“ A man finds out there are other machines made like his, which he would like to stop; he sets up inadvertence, gets a new patent, and stops them. If he swears it, who can deny it? It is of younger date, and he swears he meant to describe it. This would furnish irresistible temptation to perjury.There is a deeper objection. A man makes an invention; he gets a patent, but his specification does not describe it, but describes something else. In the meantime, the public use, not what he has patented, but what he has not. Now, how is the public to be deprived of the use of this? ”
