Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11713830 | Erosion-resistant valve trim | Daniel J. Eilers | 2023-08-01 |
| 11339897 | Valve trim apparatus for use with control valves | Thomas N. Gabriel, Jason Gene Olberding, Daniel J. Eilers, Raymond W. Micheel | 2022-05-24 |
| 10781927 | Monolithic, non-plugging multi-stage valve trim | David S. Goode, Cory J. Hagen, Thomas N. Gabriel | 2020-09-22 |
| 8186646 | Valve trim retention apparatus | Theodore Paul Geelhart | 2012-05-29 |
| 6997211 | Multiple material valve plug for high temperature operation | Paul T. Alman | 2006-02-14 |
| 6840520 | Valve plug seal assembly | Wayne Russell Faas, Ted Dennis Grabau | 2005-01-11 |
| 5618025 | Protected soft seat with secondary hard seat | Edward J. Merwald | 1997-04-08 |
| 5615708 | Flow control valve with non-plugging multi-stage valve trim | — | 1997-04-01 |
| 4554943 | Single disc rotary valve | Robert L. Claney, Herbert H. Walton, Steven D. Kehoe | 1985-11-26 |