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US Patent: 991,431
Controller for electric drills
Patentee: William O. Duntley (exact or similar names) - Chicago, IL USPTO Classifications: 200/405, 200/462, 200/5R, 200/7 Tool Categories: handheld power tools : handheld power drills Assignees: Chicago Pneumatic Tool Co. - Chicago, IL Manufacturer: Chicago Pneumatic Tool Co. - Chicago, IL Witnesses: Robert Dobberman S. E. Hibben	Patent Dates: Applied: Sep. 07, 1906 Granted: May 02, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Chicago Pneumatic Tool Co.

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