RECENTLY PATENTED INVENTIONS. Of General Interest. Hardware. Heating and Lighting. Household Utilities. Machines and Mechanical Devices. INDEX OF INVENTIONS For which Letters Patent of the United States were Issued for the Week Ending September 14 1909 AND BACH BEARING THAT DATE Legal Notices AO YEARS EXPER1ENCS PATENTS Demons COPYRIGHTS &C., scientific american, -1909-10-11
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