COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the United States were Granted In the Week Ending AND EACH BEARING TRAT DATE. English Patents Issued to Americans., scientific american, 1879-09-20
COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the United States were Granted In the Week Ending AND EACH BEARING TRAT DATE. English Patents Issued to Americans., scientific american, 1879-09-20
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