MR. JUSTICE BROWN, after stating the case, delivered the opinion of the court.
About three months prior to the patent in suit, and on April 16, 1872, another patent, numbered 125,684, was issued to Elijah and John McCreary, for "an improvement in steering devices for canal boats," etc., which covered a similar coupling together of boats, barges and scows by means of a vertical groove formed in the overhanging stern guard or bumper of the forward boat, which groove...
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