Mr. Chief Justice TANEY delivered the opinion of the Court.
This case is brought here by writ of error, directed to the Circuit Court of the United States for the district of Massachusetts. It is an action by the plaintiff in error against the defendants, to recover damages for the infringement of a patent right, obtained by the plaintiff on the 16th of November, 1839. The patent is in the usual form, and the questions before us depend upon the construction of the...
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