Horace Gray, Wade v. Metcalf — Opinion of the Court
“ If the first two clauses of the section, taken by themselves, leave the matter in any doubt, the succeeding clause, including every person 'who sells or uses one so constructed,' makes it perfectly clear that the implied license conferred by the section sets the specific machine free from the monopoly of the patent in the hands of any person, just as if that person were the lawful assignee of one holding the machine under a purchase or an express and unrestricted license from the inventor. ”
