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US Patent: 222,178
Improvement in machines for making metal screws
Patentee: Thomas F. Carver (exact or similar names) - Worcester, MA USPTO Classifications: 29/37R, 29/48.50R Tool Categories: metalworking machines : screw machines Assignees: Henry G. Crane - Worcester, MA Charles C. McCloud - Worcester, MA Thomas F. Carver - Worcester, MA Manufacturer: Not known to have been produced Witnesses: Henry G. Crane Charles C. McCloud	Patent Dates: Applied: Aug. 20, 1877 Granted: Dec. 02, 1879 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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