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US Patent: 2,575,332
Drill
Patentee: Harry D. Cummins (exact or similar names) - Pasadena, Los Angeles County, CA USPTO Classifications: 228/225, 228/262.44, 408/144, 420/458, 76/108.1, 76/DIG.11 Tool Categories: metalworking machines : drilling and boring : drill bits Assignees: Thomas H. Coffey - La Crescenta, Los Angeles Count, CA William Douglas Sellers - Pasadena, Los Angeles County, CA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 19, 1946 Granted: Nov. 20, 1951 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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