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US Patent: 639,538
Power-hammer
Patentee:
Hermann G. Dittbenner - 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:
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"Vintage Machinery" entry for Diamond Iron Works
Description:
An Iron Store "Giant" hammer is reported, bearing this patent date.

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