Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33614 | Apparatus and method for enhanced oil recovery | Carl M. Schwab, Jr., Clark E. Robison | 1991-06-18 |
| 4834176 | Well valve | — | 1989-05-30 |
| 4646828 | Apparatus for enhanced oil recovery | Carl M. Schwab, Jr., Clark E. Robison | 1987-03-03 |
| 4632184 | Submersible pump safety systems | Rennie L. Dickson, Roger D. Rion | 1986-12-30 |
| 4624310 | Well apparatus | Ralph H. Echols, Bhanubhai H. Patel | 1986-11-25 |