Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4945949 | Reduce height dust valve | — | 1990-08-07 |
| 4498492 | Dust valve and trap | — | 1985-02-12 |
| 4480812 | Trap with reduced force opening means | — | 1984-11-06 |
| 4308894 | Dust trap and valve with auxiliary pressure equalizing valve | — | 1982-01-05 |
| 4307747 | Dust trap with removable valve seat | — | 1981-12-29 |