Samuel Freeman Miller,
Eureka Company v. Bailey Company…
“ If the defendant means, by the very vague answer to the bill, to set up and to rely on a fraud by which the commissioner was misled and deceived and induced to reissue the patent, and that the plaintiff or its assignors were the guilty parties, that question cannot be raised in this collateral proceeding, and can only be considered in some direct suit to impeach and set aside the patent. ”
