Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11767921 | Ball valve | Doug Zimmerer | 2023-09-26 |
| 11221083 | Surge relief valve | — | 2022-01-11 |
| 10323759 | Check valve control unit | Douglas J. Tanner, Forrest Halvorson, David G. Hildebrandt, Donald L. Bartell, JR., Dennis Jay Smith, Jr. | 2019-06-18 |
| 7766044 | Two-way damper | Ted J. Makowan | 2010-08-03 |
| 7681864 | Adjustable actuator stop | — | 2010-03-23 |
| 7303180 | Valve actuator with split thrust bearing | — | 2007-12-04 |
| 6871664 | Valve flange connection | — | 2005-03-29 |