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US Patent: 790,553
Power Hammer
Patentee: George Bignell (exact or similar names) - Denver, Denver County, CO USPTO Classifications: 72/433, 72/450, 72/482.5 Tool Categories: metalworking machines : forging machines : power hammers Assignees: Geo. Bignell Power Hammer and General Mfg. Co. - Denver, Denver County, CO Manufacturer: Geo. Bignell Power Hammer and General Mfg. Co. - Denver, Denver County, CO Witnesses: W. C. King L. Ward Bannister S. Roland Johnson Sara P. Johnson	Patent Dates: Applied: Apr. 27, 1904 Granted: May 23, 1905 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for George Bignell Power Hammer and General Mfg. Co.

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