Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6397874 | Dual backflow check valve | John M. Grooms | 2002-06-04 |
| 5570715 | Sump-vented controller mechanism for vacuum sewerage transport system | John M. Grooms | 1996-11-05 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6397874 | Dual backflow check valve | John M. Grooms | 2002-06-04 |
| 5570715 | Sump-vented controller mechanism for vacuum sewerage transport system | John M. Grooms | 1996-11-05 |