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US Patent: 751,522
Power Hammer
Patentee: Arthur Alfred Koch (exact or similar names) - Montezuma, Poweshick County, IA USPTO Classifications: 192/224.1, 72/441, 72/451 Tool Categories: metalworking machines : forging machines Assignees: None Manufacturer: Marshall Foundry & Machine Shop - Marshalltown, Marshall County, IA Grinnell Mfg. Co. - Grinnell, Poweshiek County, IA Witnesses: Charles W. Clark Jennie Allely H. Walker C. R. Ferguson	Patent Dates: Applied: Feb. 27, 1903 Granted: Feb. 09, 1904 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Marshall Foundry & Machine Shop "Vintage Machinery" entry for Grinnell Mfg. Co.

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