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Stand-Value for Oil-Well Pumps.
Patent for a Stand-Value for Oil-Well Pumps so that the ball seat in an oil well pump does not work loose. This is also meant to be turned end for end so that the part's life is lengthened. With this being done, the utility of the oil-pump should now be enhanced.
Date:
September 24, 1918
Creator:
Slaughter, George W., Jr.
System:
The Portal to Texas History