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US Patent: 639,538
Power-hammer
Patentee: Hermann G. Dittbenner (exact or similar names) - Minneapolis, MN USPTO Classifications: 173/118, 173/122, 173/126, 72/433, 72/444 Tool Categories: metalworking machines : forging machines : drop hammers Assignees: Minneapolis Iron Store Co. - Minneapolis, MN Manufacturer: Diamond Iron Works - Minneapolis, MN Witnesses: M. E. Gooley Richard Paul	Patent Dates: Applied: Mar. 28, 1898 Granted: Dec. 19, 1899 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Diamond Iron Works
Description: An Iron Store "Giant" hammer is reported, bearing this patent date.

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