Issued Patents 1989
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872480 | Swing check valve | — | 1989-10-10 |
| 4872479 | Swing check valve | — | 1989-10-10 |
| 4872478 | Swing check valve | — | 1989-10-10 |
| 4872477 | Swing check valve | — | 1989-10-10 |
| 4860789 | Swing check valve with hinge pin insert | — | 1989-08-29 |
| 4860790 | Swing check valve disc | — | 1989-08-29 |
| 4852603 | Swing check valve with secured cartridge | — | 1989-08-01 |
| 4852607 | Support for check valve disc | — | 1989-08-01 |
| 4832076 | Swing check valve with hinge pin retainer | — | 1989-05-23 |
| 4813451 | Swing check valve with removable cartridge | — | 1989-03-21 |
| 4811929 | Needle valve seat | — | 1989-03-14 |
| 4809738 | Swing check valve | — | 1989-03-07 |
| 4809741 | Check valve | — | 1989-03-07 |
| 4809739 | Check valve | — | 1989-03-07 |
| 4796663 | Fabricated check valve construction | — | 1989-01-10 |