Le Roy v. Tatham

This is a case on error, from the Circuit Court of the Southern District of New York.

The action was brought in the Circuit. Court, to recover damages for an alleged infringement of ■ a patent for new and useful improvements in machinery for making pipes and tubes from metallic substances.

The declaration alleged that John and Charles Hanson, of England, were the inventors of the improvements specified, on or prior to the 31st of August, 1837 ; that on the 10th of January, 1840', the ITansons assigned to H. B. and B. Tatham, two of the defendants in error, the full and exclusive right to said…