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US Patent: 1,253,291
Drill Sharpener
Patentee:
William A. Smith - Denver, CO

USPTO Classifications:
76/5.4

Tool Categories:
metalworking machines : grinders : drill grinders

Assignees:
Denver Rock Drill Mfg. Co. - Denver, CO

Manufacturer:
Not known to have been produced

Witnesses:
D. E. Strout
L. N. Rodolf

Patent Dates:
Applied: Feb. 27, 1917
Granted: Jan. 15, 1918

Patent Pictures:
USPTO pdf tiff
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Description:
B. Gater - patent attorney

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