Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5323859 | Streamlined flapper valve | Roddie R. Smith, Rennie L. Dickson | 1994-06-28 |
| 5318127 | Surface controlled annulus safety system for well bores | Rennie L. Dickson | 1994-06-07 |
| 5137089 | Streamlined flapper valve | Roddie R. Smith, Rennie L. Dickson | 1992-08-11 |
| 4842074 | Gas storage well safety system and method | Michael J. Bednarz, Ronald K. Churchman | 1989-06-27 |
| 4834183 | Surface controlled subsurface safety valve | Michael B. Vinzant, Rennie L. Dickson, Robert C. Hammett | 1989-05-30 |