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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:
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