MR. JUSTICE CLIFFORD delivered the opinion of the court.
Owners of a patent, whether patentees or assignees, may seek redress for the unlawful use of the improvement which it secures, in the Circuit Court, by a suit at law or in equity, at their option; but in either form of proceeding they must allege and prove that they, or those under whom they claim, are the original and first inventors of the improvement, and that the opposite party or parties have infringed...
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