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US Patent: 1,178,892
Rock Drill
Patentee: Daniel S. Waugh (exact or similar names) - Denver, CO USPTO Classifications: 173/133, 173/137, 173/157, 173/161, 173/36, 173/62, 173/63, 173/65, 173/73, 173/78, 173/80 Tool Categories: Assignees: Denver Rock Drill Mfg. Co. - Denver, CO Manufacturer: Not known to have been produced Witnesses: W. H. Leonard Jason R. Elmendorf	Patent Dates: Applied: Apr. 17, 1912 Granted: Apr. 11, 1916 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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