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US Patent: 1,900,384
Power Plant for Drilling Apparatus
Martin Kahr - Franklin, Venango County, PA

USPTO Classifications:
74/471R, 74/661

Tool Categories:
specialty machines : oilfield machinery

Franklin Valveless Engine Co. - Franklin, Venango County, PA

Not known to have been produced

none listed

Patent Dates:
Applied: Mar. 25, 1926
Granted: Mar. 07, 1933

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Franklin Valveless Engine Co.

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