“Error, to the circuit court for the district of Pennsylvania. This was an action by the plaintiff in error, against the defendant in error, for an alleged infringement of the plaintiff’s patent right to the use of his improved hopper-boy, one of the several machines discovered, invented, improved, and applied by him to the art of manufacturing flour and meal, which patent was granted on the 22d January, 1808. The defendant pleaded the general issue, and gave the notice hereafter stated.