Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4739770 | Flush device | Thomas P. Stephens, Robert G. Graves, David A. Bristol | 1988-04-26 |
| 4718634 | Physiological pressure monitoring system flush valve | — | 1988-01-12 |
| 4703759 | Flush valve device | Edwin B. Merrick | 1987-11-03 |