Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5337773 | Vacuum-operated draining systems | — | 1994-08-16 |
| 5322329 | Coupling for a vacuum fluid line | — | 1994-06-21 |
| 4376444 | Vacuum operated check valve for vacuum conduits | — | 1983-03-15 |
| 4370227 | Vacuum drain facility | — | 1983-01-25 |
| 4333487 | Pneumatically driven drainage facility | — | 1982-06-08 |
| 4333830 | Vacuum drain system | — | 1982-06-08 |
| 4209034 | Backwater tank for a building connected to a vacuum drain facility | — | 1980-06-24 |