INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending AND EACH BEARING THAT DATE. 216169 English Patents Issued to Americans. 216062, scientific american, 1879-07-12
INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending AND EACH BEARING THAT DATE. 216169 English Patents Issued to Americans. 216062, scientific american, 1879-07-12
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