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US Patent: 1,742,654
Slip Rol Forming Machine
Patentee: Paul R. Hahnemann (exact or similar names) - Buffalo, Erie County, NY USPTO Classifications: 72/169, 72/175, 72/23 Tool Categories: metalworking machines : sheet metal : sheet metal forming rolls Assignees: Niagara Machine & Tool Works - Buffalo, Erie County, NY Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: May 07, 1928 Granted: Jan. 07, 1930 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Niagara Machine & Tool Works

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