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US Patent: 723,840
Controlling Switch System
Patentee: Adolph L. De Leeuw (exact or similar names) - Hamilton, Butler County, OH USPTO Classifications: 192/48.2, 192/84.1, 200/11J, 307/101, 361/167 Tool Categories: metalworking machines : machine tool controls Assignees: Niles Tool Works - Hamilton, Butler County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 13, 1902 Granted: Mar. 31, 1903 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Niles Tool Works

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