| 11221002 |
Tandem motor linear rod pump |
Andrew J. Hilgers, Benjamin J. Gregory, Ronald G. Peterson |
2022-01-11 |
| 10968904 |
Tandem motor linear rod pump |
Andrew J. Hilgers, Benjamin J. Gregory, Ronald G. Peterson |
2021-04-06 |
| 10197048 |
Tandem motor linear rod pump |
Andrew J. Hilgers, Benjamin J. Gregory, Ronald G. Peterson |
2019-02-05 |
| 9494504 |
Dual component density sampler apparatus |
James P. McCrickard, Ronald G. Peterson, Thomas L. Beck, Michael Dry |
2016-11-15 |
| 8727749 |
Cranked rod pump method |
Thomas L. Beck, Ronald G. Peterson, Michael Dry |
2014-05-20 |
| 8708671 |
Cranked rod pump apparatus and method |
Benjamin J. Gregory, Thomas L. Beck, Ronald G. Peterson, Michael Dry |
2014-04-29 |
| 8641390 |
Linear rod pump apparatus and method |
Thomas L. Beck, Robb G. Anderson, Ronald G. Peterson |
2014-02-04 |
| 8555984 |
Linear rod pump operating method |
Thomas L. Beck, Robb G. Anderson, Ronald G. Peterson |
2013-10-15 |
| 8384318 |
Induction motor torque control in a pumping system |
Thomas L. Beck, Michael Dry, Mark E. Garlow, Michael O. Lucas, Ronald G. Peterson |
2013-02-26 |
| 8328536 |
Cranked rod pump apparatus |
Thomas L. Beck, Ronald G. Peterson, Michael Dry |
2012-12-11 |
| 8152492 |
Linear rod pump apparatus and method |
Thomas L. Beck, Robb G. Anderson, Ronald G. Peterson |
2012-04-10 |
| 8080950 |
Induction motor torque control in a pumping system |
Thomas L. Beck, Michael Dry, Mark E. Garlow, Michael O. Lucas, Ronald G. Peterson |
2011-12-20 |