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US Patent: 1,273,733
Drill Holder
Patentee:
John M. Calderwood - Spanish Fork, UT

USPTO Classifications:
173/100, 173/35, 173/42, 396/373

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Apr. 10, 1918
Granted: Jul. 23, 1918

Patent Pictures:
USPTO pdf tiff
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