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US Patent: 1,900,384
Power Plant for Drilling Apparatus
Patentee: Martin Kahr (exact or similar names) - Franklin, Venango County, PA USPTO Classifications: 74/471R, 74/661 Tool Categories: specialty machines : oilfield machinery Assignees: Franklin Valveless Engine Co. - Franklin, Venango County, PA Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Mar. 25, 1926 Granted: Mar. 07, 1933 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Franklin Valveless Engine Co.

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