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US Patent: 2,214,141
Rail slotter
Patentee: Arthur William Mall (exact or similar names) - Chicago, IL USPTO Classifications: 451/121, 451/231, 451/347, 451/429 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 27, 1937 Granted: Sep. 10, 1940 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Mall Tool Co.

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