Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5310005 | Flapper valve assembly with floating hinge | — | 1994-05-10 |
| 5145005 | Casing shut-in valve system | — | 1992-09-08 |
| 5141023 | Flow actuated safety valve | John C. Gano | 1992-08-25 |
| 5133404 | Rotary running tool for rotary lock mandrel | — | 1992-07-28 |
| 5095994 | Flow actuated safety valve with retrievable choke and metal seals | — | 1992-03-17 |
| 5082061 | Rotary locking system with metal seals | — | 1992-01-21 |
| 4969515 | Expendable devices for well lock system | — | 1990-11-13 |
| 4919205 | Friction-reducing device | — | 1990-04-24 |
| 4776401 | Foot valve for pumping wells | — | 1988-10-11 |
| 4693171 | Position responsive valve control for hydraulic cylinder | — | 1987-09-15 |
| 4691511 | Hydraulic well pump | — | 1987-09-08 |
| 4680930 | Hydraulic control circuit and valve assembly | — | 1987-07-21 |
| 4571939 | Hydraulic well pump | — | 1986-02-25 |
| 4491055 | Control of continuous reciprocation of a fluid power cylinder | — | 1985-01-01 |
| 4312378 | Tool diverter | — | 1982-01-26 |
| 4252149 | Tool diverter | — | 1981-02-24 |