Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6991218 | Control valve with retained pin for easy valve trim maintenance | Michel K. Lovell, Michael M. Anderson, Mark Stiehl | 2006-01-31 |
| 4986300 | Bonnet nut with improved safety characteristics | Melvin L. Osgood | 1991-01-22 |