MR. JUSTICE FIELD, having stated the facts of the case, delivered the opinion of the court.
The defendants below, appellants here, seek a reversal of the decree of the Circuit Court upon several grounds, and, among others, these: 1st, that the complainants have not established a title in themselves to the patents; and 2d, that they have not proved any damages for the infringement of the claims of the patentee.
The first of these grounds rests upon the supposed...
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