Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662178 | Wave strip perforating system | Jay R. Shirley | 1997-09-02 |
| 5638901 | Spiral strip perforating system | Jay R. Shirley | 1997-06-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662178 | Wave strip perforating system | Jay R. Shirley | 1997-09-02 |
| 5638901 | Spiral strip perforating system | Jay R. Shirley | 1997-06-17 |