Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4534765 | Modular drainage apparatus having excess negativity control | Eugene E. Weilbacher | 1985-08-13 |
| 4455141 | Drainage apparatus with vacuum control | — | 1984-06-19 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4534765 | Modular drainage apparatus having excess negativity control | Eugene E. Weilbacher | 1985-08-13 |
| 4455141 | Drainage apparatus with vacuum control | — | 1984-06-19 |