Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7416164 | Elliptical sealing surface for butterfly valve | James Leroy Lounsberry, Wilbur Dean Hutchens | 2008-08-26 |
| 7347256 | Portable well fluid extraction apparatus | — | 2008-03-25 |
| 7296585 | Elliptical sealing surface for butterfly valve | James Leroy Lounsberry, Wilbur Dean Hutchens | 2007-11-20 |
| 7243901 | Rotary valve apparatus and associated methods | — | 2007-07-17 |
| 7080820 | Elliptical sealing surface for butterfly valve | James Leroy Lounsberry, Wilbur Dean Hutchens | 2006-07-25 |
| 7007751 | Apparatus for extracting oil or other fluids from a well | — | 2006-03-07 |
| 6332600 | Rotary valve apparatus | — | 2001-12-25 |
| 6213141 | Rotary valve apparatus and associated methods | — | 2001-04-10 |
| 6062534 | Double acting rotary valve actuator | — | 2000-05-16 |
| 6000675 | Tension-spring return rotary valve actuator | — | 1999-12-14 |
| 5988205 | Rotary valve actuator with zero lost motion universal connection | — | 1999-11-23 |
| 5979864 | Double convoluted pliable pressure conversion unit | — | 1999-11-09 |
| 5975487 | Rotary valve actuator with high-low-high torque linkage | — | 1999-11-02 |
| 5853022 | Valve actuator with instrument mounting manifold | Steven B. Paullus, Danny Paul Nelson, Kenneth Lemoyne Rasmussen, Randy Hall, Melvin L. Osgood | 1998-12-29 |
| 5762315 | Valve actuator with pliable pressure conversion device | — | 1998-06-09 |
| 5487527 | Valve actuator | — | 1996-01-30 |
| D363761 | Valve actuator | Randy Hall | 1995-10-31 |
| 5427358 | Sweep flow valve with removable valve seat | Douglas James Boyd | 1995-06-27 |
| 4231546 | High-temperature bidirectional metal seal | Eugene R. Taylor, Jr. | 1980-11-04 |