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US Patent: 752,223
Variable-speed mechanism
Patentee: Charles S. Hisey (exact or similar names) - Dayton, KY USPTO Classifications: 74/354 Tool Categories: handheld power tools : handheld power drills Assignees: Hisey-Wolf Machine Co. - Cincinnati, OH Manufacturer: Hisey-Wolf Machine Co. - Cincinnati, OH Witnesses: Luise Beck Oliver B. Kaiser	Patent Dates: Applied: Oct. 22, 1903 Granted: Feb. 16, 1904 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hisey-Wolf Machine Co.

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