Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809989 | Coil spring supported sealing element and device | — | 1989-03-07 |
| 4685523 | Removable side pocket mandrel | James H. Paschal, Jr., Oscar H. Freiman | 1987-08-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809989 | Coil spring supported sealing element and device | — | 1989-03-07 |
| 4685523 | Removable side pocket mandrel | James H. Paschal, Jr., Oscar H. Freiman | 1987-08-11 |