Cummings v. Standard Harrow Co.

The plaintiff, the owner of certain letters patent for improvements in potato diggers, and the inventor of certain other improvements not then patented, entered into a written contract with the defendant, granting to the latter the sole and exclusive right and license to make and sell the machines containing said inventions and improvements ; in consideration whereof the defendant agreed to pay a royalty of five dollars on each of the first 5,000 machines manufactured and sold, a royalty of four dollars on each of the second 5,000 machines manufactured and sold, and thereafter a royalty of…