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US Patent: 1,259,855
Rotary Drilling Apparatus
Patentee: Edgar E. Greve (exact or similar names) - Bellevue, PA USPTO Classifications: 464/163 Tool Categories: Assignees: Oil Well Supply Co. - Pittsburgh, PA Manufacturer: Not known to have been produced Witnesses: J. M. Geoghegan Lois Wineman J. Herbert Bradley	Patent Dates: Applied: Jul. 14, 1917 Granted: Mar. 19, 1918 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: W. G. Doolittle - patent attorney

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