English Patents Issued to Americans. INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending December 14 1880 AND EACH BEARING THAT DATE., scientific american, 1881-01-15
English Patents Issued to Americans. INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending December 14 1880 AND EACH BEARING THAT DATE., scientific american, 1881-01-15
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