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US Patent: 943,142
Variable Speed Driving Mechanism
Patentee: Adolph L. De Leeuw (exact or similar names) - Hamilton, Butler County, OH USPTO Classifications: 192/111.6, 192/48.9, 192/70.24, 74/348 Tool Categories: metalworking machines : metalworking machine mechanisms : metalworking variable speed mechanisms Assignees: Cincinnati Milling Machine Co. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 07, 1907 Granted: Dec. 14, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.

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