Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909769 | Fluid loss device | Peter A. Duhon | 1999-06-08 |
| 5775421 | Fluid loss device | Peter A. Duhon | 1998-07-07 |
| 4813481 | Expendable flapper valve | Richard M. Sproul, Frank Giusti, Jr., Richard L. Grant | 1989-03-21 |