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US Patent: 790,553
Power Hammer
Patentee:
George Bignell - Denver, Denver County, CO

USPTO Classifications:
72/433, 72/450, 72/482.5

Tool Categories:
metalworking machines : forging machines : power hammers

Assignees:
Geo. Bignell Power Hammer and General Mfg. Co. - Denver, Denver County, CO

Manufacturer:
Geo. Bignell Power Hammer and General Mfg. Co. - Denver, Denver County, CO

Witnesses:
W. C. King
L. Ward Bannister
S. Roland Johnson
Sara P. Johnson

Patent Dates:
Applied: Apr. 27, 1904
Granted: May 23, 1905

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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"Vintage Machinery" entry for George Bignell Power Hammer and General Mfg. Co.

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