Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10094480 | Rotary multi-port valve | Sergey Shatalov | 2018-10-09 |
| 9228664 | Rotary multi-port valve | Kenton Chickering, III, Bela Vaczi | 2016-01-05 |
| 8308132 | Hemi-wedge verifiable shutoff valve | — | 2012-11-13 |
| 8066872 | Dual weir vortex skimmer | D. Richard Partridge, Jeffrey Partridge | 2011-11-29 |
| 7931251 | Expanding gate valve | — | 2011-04-26 |
| 7284563 | Surge relief apparatus and method | Donald J. Wass, Donald M. Allen | 2007-10-23 |
| 7234488 | Valve assembly and method with slotted plates and spherical ball plug | Clayton L. Carroll | 2007-06-26 |
| 6164622 | Compact expanding gate valve | — | 2000-12-26 |
| 5341840 | Bonnetless swing check valve | Ronald Manson | 1994-08-30 |
| 5010919 | Subsea barrier valve | — | 1991-04-30 |
| 4477055 | Valve seat for ball valves | — | 1984-10-16 |
| 4286614 | High temperature ball valve | Gary W. Kacal | 1981-09-01 |
| 4266566 | Spring assembly for floating seat ring | Gary W. Kacal | 1981-05-12 |
| 4240608 | Controlled float seat arrangement for expanding gate valves | — | 1980-12-23 |