Kopcynski; Wink H.

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Ada, OK, US

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Patents Grantslast 30 patents

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Hydraulically operated pump jack with holding valves and control as...
- Patent number 4,381,695
- Issue date May 3, 1983
- Kopcynski; Wink H.
- Ethridge F. Ogles
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...