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US Patent: 1,256,222
Drill Socket
Patentee:
John F. Graybill (exact or similar names) - Flora, IL

USPTO Classifications:
279/103, 279/14

Tool Categories:
metalworking machines : drilling and boring : drill presses : drill press chucks

Assignees:
John F. Graybill - Flora, IL
Earl Arbuthnot - Flora, IL
Horatio C. Chaffin - Flora, IL

Manufacturer:
Not known to have been produced

Witnesses:
J. L. Boyles
E. W. Bryan

Patent Dates:
Applied: Mar. 14, 1917
Granted: Feb. 12, 1918

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
Description:
Watson E. Coleman - patent attorney

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