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US Patent: 1,253,828
Drill Steel Retaining Device
Patentee:
Charles A. Hultquist - Los Angeles, CA

USPTO Classifications:
279/19.1

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
George H. Hiles
A.. F. Schmidtbauer
Lute A. Alter
Sally Russo

Patent Dates:
Applied: Mar. 26, 1917
Granted: Jan. 15, 1918

Patent Pictures:
USPTO pdf tiff
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Description:
Frederick Shyon - patent attorney

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