Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6772783 | Rotary to linear valve and method of use | — | 2004-08-10 |
| 4886121 | Universal flexbowl wellhead and well completion method | Albert Demny, J. Matt Harwell, Robert E. Bush | 1989-12-12 |
| 4787642 | X-shaped high pressure sealing structure | — | 1988-11-29 |
| 4774980 | Piloted wellhead flow control valve | — | 1988-10-04 |
| 4662603 | Piloted wellhead flow control valve | — | 1987-05-05 |