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US Patent: 1,483,901
Variable Speed Drive
Patentee: Alfred R. McCann (exact or similar names) - Hamilton, Butler County, OH USPTO Classifications: 474/3, 474/81 Tool Categories: metalworking machines : metal planers Assignees: Liberty Machine Tool Co. - Hamilton, Butler County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 20, 1921 Granted: Feb. 19, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Liberty Machine Tool Co.

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