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US Patent: 1,791,532
Semiautomatic Drill and Tapping Jig
Patentees: Eugene L. Oberly (exact or similar names) - Chicago, Cook County, IL Henry Hansen (exact or similar names) - Chicago, Cook County, IL USPTO Classifications: 408/97, 470/98 Tool Categories: metalworking tools : jigs and fixtures metalworking machines : drilling and boring : tapping machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 11, 1924 Granted: Feb. 10, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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