COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending September 9 1879 AND EACH BEARING THAT DATE. English Patents Issued to Americans., scientific american, 1879-10-11
COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending September 9 1879 AND EACH BEARING THAT DATE. English Patents Issued to Americans., scientific american, 1879-10-11
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