The case is fully stated in the opinion of the Court.
Mr. Chief Justice TANEY delivered the opinion of the Court.
This case is brought here by a writ of error to the Circuit Court of the United States, for the district of Massachusetts.
The action was instituted for the purpose of recovering damages for an infringement of a patent, which the plaintiffs had obtained for an improvement in the construction of the plough.
The invention is described...
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