MR. JUSTICE BLATCHFORD delivered the opinion of the court.
This is a suit in equity, brought by the National Car-Brake Shoe Company, a corporation, against the Lake Shore and Michigan Southern Railway Company, in the Circuit Court of the United States for the Northern District of Illinois, for the infringement of letters patent No. 40,156, granted to James Bing as inventor, October 6th, 1863, for 17 years, for an "improved shoe for car-brakes." The bill was filed...
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