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US Patent: 407,530
Machine for Shaping Sheet Metal
Patentee: Thomas W. Irwin (exact or similar names) - 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: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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