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US Patent: 837,519
Power Hammer
Patentees: George H. Tolley (exact or similar names) - Denver, Denver County, CO William G. Simcock (exact or similar names) - Denver, Denver County, CO USPTO Classifications: 72/434, 72/441, 72/446, 74/582 Tool Categories: metalworking machines : forging machines : power hammers Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 03, 1906 Granted: Dec. 04, 1906 Patent Pictures: 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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