4 F. 151 | U.S. Circuit Court for the District of Northern New York | 1880
In this case a motion is made by the defendant that copies of three file wrappers, contents, and drawings, in the matter of three several letters patent, may be made a part of defendant’s exhibits and proofs, with the same effect as if they had been put in evidence when said three letters patent were put in evidence, or that the suit be referred back to the examiner, with leave to the defendant to introduce such evidence, or that it be referred back for both parties to introduce further proofs; and that the interlocutory decree made herein be so far opened as that the defendant have leave to reargue the case, after such new evidence shall have been received, with the same effect as though the samo had never been argued.
The object of introducing in evidence such file wrappers is stated to bo to show that the inventions described in the several patents were made at dates as early as tlie oaths to the specifications. That is not the proper way to show the reduction to practico and use of the inventions claimed to bo prior, so as to invalidate the plaintiffs’ patent. That must be shown by direct evidence of the construction and use of the machines. Nothing from the patent-office can be admitted in evidence of earlier dates than the patents. All such evidence would be hearsay and secondary. A patent is allowed, by statute, to speak as a public grant; but the preliminary papers are merely the declarations of third persons not parties to this suit, or connected with them in interest or title. The evidence is not competent.
The motion is denied in all its branches.