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US Patent: 755,504
Variable Speed Mechanism
Patentees: Charles F. Laur - Cincinnati, OH Albert E. Robinson - Covington, KY USPTO Classifications: 74/329, 74/359 Tool Categories: Assignees: American Tool Works Co. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Oliver B. Kaiser Luise Beck	Patent Dates: Applied: Oct. 19, 1903 Granted: Mar. 22, 1904 Patent Pictures: USPTO pdf tiff Google Patents Report data errors or omissions "Vintage Machinery" entry for American Tool Works Co.
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