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US Patent: 407,530
Machine for Shaping Sheet Metal
Patentee:
Thomas W. Irwin - Allegheny, Allegheny County, PA

USPTO Classifications:
72/220

Tool Categories:
metalworking machines : sheet metal : sheet metal brakes

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 06, 1888
Granted: Jul. 23, 1889

Patent Pictures:
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