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US Patent: 1,273,733
Drill Holder
Patentee: John M. Calderwood (exact or similar names) - 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 (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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