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US Patent: 1,185,060
Spring Counterbalance for the Rams of Boring Mills
Patentee: Frederick F. Clarke (exact or similar names) - Franklin, Venango County, PA USPTO Classifications: 408/135, 408/235 Tool Categories: metalworking machines : metalworking machine mechanisms metalworking machines : drilling and boring : vertical boring mills Assignees: Colburn Machine Tool Co. - Franklin, Venango County, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 10, 1914 Granted: May 30, 1916 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Colburn Machine Tool Co.

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