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US Patent: 158,920
Machines for Trimming and Beading Sheet-Metal
Patentee:
John De Butt (exact or similar names) - Philadelphia, PA

USPTO Classifications:
72/105, 72/70, 83/344

Tool Categories:
metalworking machines : sheet metal : rotary cutters

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Oct. 00, 1874
Granted: Jan. 19, 1875

Patent Pictures:
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