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US Patent: 509,897
Drop Hammer
Patentees:
Walter P. Hatch (exact or similar names) - Chicago, Cook County, IL
Thomas Murphy (exact or similar names) - Chicago, Cook County, IL

USPTO Classifications:
72/437, 72/448, 72/456

Tool Categories:
metalworking machines : forging machines : drop hammers

Assignees:
Walter P. Hatch - Chicago, Cook County, IL

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 13, 1892
Granted: Dec. 05, 1893

Patent Pictures:
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