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US Patent: 2,481,642
Multiple Tool Head
Patentees: Charles S. Bohmer (exact or similar names) - Chicago, Cook County, IL Carl A. Grunschel (exact or similar names) - Park Ridge, Cook County, IL USPTO Classifications: 74/665R, 74/813L Tool Categories: metalworking machines : drilling and boring : drill presses : drill press accessories metalworking machines : drilling and boring : drill presses : drill press chucks Assignees: None Manufacturer: Chicago Quadrill Co. - Des Plaines, Cook County, IL Witnesses: none listed	Patent Dates: Applied: Jul. 08, 1944 Granted: Sep. 13, 1949 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Chicago Quadrill Co.

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