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US Patent: 520,447
Clutch
Patentees: Michael F. McMahon (exact or similar names) - Worcester, MA Thomas F. Carver (exact or similar names) - Worcester, MA USPTO Classifications: 192/48.5, 192/53.5 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine clutches Assignees: Michael F. McMahon - Worcester, MA Manufacturer: Not known to have been produced Witnesses: Charles H. Burleigh Ella P. Blenus	Patent Dates: Applied: Sep. 11, 1893 Granted: May 29, 1894 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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