Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862958 | Coil tubing fluid power actuating tool | — | 1989-09-05 |
| 4862965 | Threadless well tool and method of making | — | 1989-09-05 |
| 4860991 | Safety valve | William A. Blizzard, Jr. | 1989-08-29 |
| 4854387 | Large bore retrievable well safety valve | — | 1989-08-08 |
| 4844166 | Method and apparatus for recompleting wells with coil tubing | Walter S. Going, III, Arthur J. Morris | 1989-07-04 |