Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32343 | Well safety valve | Michael B. Vinzant, Michael Wade Meaders, Robert L. Hilts | 1987-02-03 |
| 4461353 | Well safety valve | Michael B. Vinzant, Michael Wade Meaders, Robert L. Hilts | 1984-07-24 |
| 4452311 | Equalizing means for well tools | Michael B. Vinzant, Vinson D. Sullivan | 1984-06-05 |
| 4448216 | Subsurface safety valve | Kenneth L. Schwendemann, Michael B. Vinzant, Robert W. Crow, Cary Gorten Mondon | 1984-05-15 |