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US Patent: 1,577,976
Power-driven tool-operating device
Patentees: Robert S. McKeage (exact or similar names) - Chicago, IL James S. Knowlson (exact or similar names) - Oak Park, IL USPTO Classifications: 310/216.026, 310/216.124, 310/216.127, 310/410, 310/50, 310/68A Tool Categories: handheld power tools : handheld power drills Assignees: Electro-Magnetic Tool Co. - Chicago, IL Manufacturer: Electro-Magnetic Tool Co. - Cicero, IL Witnesses: Unknown	Patent Dates: Applied: Apr. 24, 1922 Granted: Mar. 23, 1926 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Electro-Magnetic Tool Co.

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