Noah Haynes Swayne,
Blake v. Robertson Robertson — Opinion of the Court
“ Where an original machine and an improvement upon it are both patented, neither patentee can use what does not belong to him, without the requisite authority from the owner. The appellants having embodied all the ideas of Blake's invention in their machine, the value which supplemented it, whether good or bad, is outside of the case, and cannot affect the result. ”
