Railroad Company v. Dubois

ERROR to the Circuit Court for the District of Maryland. Dubois brought suit against the Philadelphia, Wilmington and Baltimore Railroad Company, for damages for an infringement of a patent granted to him September 23d, 1862, for 'a new and useful improvement in the mode of building piers for bridges and other structures and setting the same.' The alleged improvement was asserted to have been used by the company in building their railroad bridge across the Susquehanna at Havre de Grace.