COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent or the United States were Granted in the Week Ending June 20 1876 AND EACH BEARING THAT DATE. SCHEDULE OF PATENT FEES. THE VALIDITY OF PATENTS. Inside Pageeach insertion - 73 cents a line. Back Page each insertion - 81.00 a line. IMPROVED DOOR LOCK EAGLE FOOT LATHES, scientific american, 1876-07-22
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