Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4744415 | Kickover tool for placing and removing well flow control devices | William B. Crawford, Mark Crawford | 1988-05-17 |
| 4715441 | Side pocket mandrel | William B. Crawford, Mark Crawford | 1987-12-29 |