“The plaintiffs filed their bill on the equity side of the court setting forth that the plaintiff Ogle is the original inventor of a new and useful improvement in the plough, for which he obtained a patent in the year 1818. That in the year 1824, he, by deed, and for a valuable consideration, assigned and conveyed to the other plaintiff all his exclusive right to the said invention, with the liberty of making, constructing, using, and vending the same toothers to be used, in and throughout the state of Pennsylvania, with a power of attorney for those purposes. That the defendant has, since the date of the said patent, and also of the said assignment within the state of Pennsylvania, constructed, and used ploughs with the improvement so patented, and is still employed in making and using the same. The bill prays an injunction, which was granted at a former session of this court until answer or further order.”