Assignee
DELTA X CORP
13 granted patents·579 citations·filing 1971–1996
Top patents by PatentIndex Score
13 records- 0194US3953777AControl circuit for shutting off the electrical power to a liquid well pumpDELTA X CORP·Filed 1973·Granted Apr 27, 1976·138 cites·5 claims
- 0289US4738313AGas lift optimizationDELTA X CORP·Filed 1987·Granted Apr 19, 1988·99 cites·7 claims
- 0388US4286925AControl circuit for shutting off the electrical power to a liquid well pumpDELTA X CORP·Filed 1979·Granted Sep 1, 1981·74 cites·5 claims
- 0485US4090405APolished rod load transducerDELTA X CORP·Filed 1977·Granted May 23, 1978·34 cites·3 claims
- 0583US4973226AMethod and apparatus for controlling a well pumping unitDELTA X CORP·Filed 1987·Granted Nov 27, 1990·68 cites·4 claims
- 0675US3953764AMethod and means for selectively positioning a light source for illuminating film transparenciesDELTA X CORP·Filed 1971·Granted Apr 27, 1976·17 cites·5 claims
- 0769US3931559AMalfunction detector circuit for the use with a pump-off control circuitDELTA X CORP·Filed 1974·Granted Jan 6, 1976·16 cites·7 claims
- 0861US5782608AMethod and apparatus for controlling a progressing cavity well pumpDELTA X CORP·Filed 1996·Granted Jul 21, 1998·42 cites·6 claims
- 0961US5167490AMethod of calibrating a well pumpoff controllerDELTA X CORP·Filed 1992·Granted Dec 1, 1992·41 cites·6 claims
- 1053US4268228AHydraulic pumping unitDELTA X CORP·Filed 1979·Granted May 19, 1981·11 cites·6 claims
- 1142US4307395AMethod of and apparatus for recording, storing and replaying dynamometer data from a liquid well pumpDELTA X CORP·Filed 1980·Granted Dec 22, 1981·16 cites·5 claims
- 1236US4509552AGas gun for determining the liquid level of a wellDELTA X CORP·Filed 1983·Granted Apr 9, 1985·12 cites·17 claims
- 1333US5064348ADetermination of well pumping system downtimeDELTA X CORP·Filed 1990·Granted Nov 12, 1991·11 cites·11 claims
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