Haussknecht v. Claypool, 66 U.S. 431 (1861)
U.S. Supreme CourtHaussknecht v. Claypool, 66 U.S. 1 Black 431 431 (1861)
Haussknecht v. Claypool
66 U.S. (1 Black) 431
1. The rules of evidence prescribed by the laws of a state are rules of decision for the United States courts while sitting within the limits of such state within the meaning and subject to the exceptions contained in the 34th section of the Judiciary Act.
2. Where a bill of exceptions sets forth that a witness was produced, was asserted to be competent by his counsel, and was rejected by the court, a court of error will imply that the witness was material to sustain the issue without a direct statement to that effect in the bill of exceptions.
3. Brevity in bills of exception commended.
Haussknecht brought trespass on the case against Claypool and Lynn in the year 1859 for an infringement of his patent for an improved running gear for carriages. The suit was commenced in the Circuit Court of the United States for the Southern District of Ohio and the damages laid at $5,000. The defendants pleaded the general issue and brought divers witnesses to prove that the plaintiff was not the original inventor of the thing he had patented, but that it had been described in printed works, and was in actual public use at a time anterior to the date of his patent. The plaintiff himself was produced as a witness to sustain his own case. His counsel asserted that by the law of Ohio, sec. 310, Code of Civil Procedure, he was a competent witness in his own behalf. The defendants objected
on the grounds first that he was a party to the cause, and therefore incompetent even by the laws of Ohio; second, that no notice of his intention to testify had been given to the defendants or their attorney, and, third that by a rule of the court, parties to suits were incompetent witnesses. These objections the court sustained, and the plaintiff's counsel took a bill of exceptions. Verdict for defendants. Writ of error to Supreme Court of the United States sued out by plaintiff.