Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5740860 | Side pocket mandrel for a measuring instrument | William B. Crawford, Mark Crawford | 1998-04-21 |
| 5058670 | Oriented valve and latch for side pocket mandrel | William B. Crawford, Mark Crawford | 1991-10-22 |
| 4765403 | Apparatus for placing and removing well flow control devices | William B. Crawford, Robert W. Dinning | 1988-08-23 |