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US Patent: 833,294
Punching and shearing mechanism
Patentee: George J. Blum (exact or similar names) - Chicago, IL USPTO Classifications: 83/200, 83/602 Tool Categories: metalworking machines : metal punching machines metalworking tools : metal punches metalworking machines : metal shearing machines Assignees: Armstrong-Blum Mfg. Co. - Chicago, IL Manufacturer: Armstrong-Blum Mfg. Co. - Chicago, IL Witnesses: L. L. Miller George L. Chindahl	Patent Dates: Applied: Jun. 08, 1903 Granted: Oct. 16, 1906 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Armstrong-Blum Manufacturing Co.

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