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US Patent: 851,956
Friction-clutch for automobiles and other purposes
Patentee: Michael F. McMahon (exact or similar names) - Worcester, MA USPTO Classifications: 192/70.22, 192/70.24, 192/70.26, 192/99A Tool Categories: transportation : motor vehicles industrial machines : industrial machine mechanisms : industrial machine clutches Assignees: None Manufacturer: Not known to have been produced Witnesses: Ella P. Blenus Charles H. Burleigh	Patent Dates: Applied: May 04, 1906 Granted: Apr. 30, 1907 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for McMahon & Carver

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