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US Patent: 142,511
Improvement in machines for tapping nuts
Patentee: Salmon W. Putnam, Jr. (exact or similar names) - Fitchburg, MA USPTO Classifications: 29/DIG.055, 29/DIG.077, 29/DIG.09, 29/DIG.093, 29/DIG.101, 29/DIG.102, 408/117, 408/61, 470/87, 74/665.0GB Tool Categories: specialty machines : nut or bolt making machines Assignees: None Manufacturer: Putnam Machine Co. - Fitchburg, MA Witnesses: R. H. Eddy S. N. Piper	Patent Dates: Applied: Jul. 05, 1873 Granted: Sep. 02, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Putnam Machine Co.
Description: Improvements to the machines of patents 70,862 and 115,451.

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