Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4550778 | Well screen | Dale W. Sullivan, Andrew Mitchell | 1985-11-05 |
| 4352512 | Molded fittings | Andrew Mitchell | 1982-10-05 |
| 4310372 | Method of making a well screen | Andrew Mitchell | 1982-01-12 |
| 4262744 | Molded fittings and methods of manufacture | Andrew Mitchell | 1981-04-21 |