Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4813451 | Swing check valve with removable cartridge | — | 1989-03-21 |
| 4811929 | Needle valve seat | — | 1989-03-14 |
| 4809738 | Swing check valve | — | 1989-03-07 |
| 4809739 | Check valve | — | 1989-03-07 |
| 4809741 | Check valve | — | 1989-03-07 |
| 4796663 | Fabricated check valve construction | — | 1989-01-10 |
| 4782855 | Check valve seat and cage retainer | — | 1988-11-08 |
| 4781214 | Swing check valve disc | — | 1988-11-01 |
| 4781212 | Swing check valve with removable cage and disc | — | 1988-11-01 |
| 4607422 | Method for locking a bonnet to a valve body | — | 1986-08-26 |
| 4452428 | Bonnet locking system for a valve | — | 1984-06-05 |
| 4431021 | Needle valve | — | 1984-02-14 |