Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878546 | Self-aligning top drive | Danial G. Shaw | 1989-11-07 |
| 4872517 | Rotatable fluid conductor for well apparatus | Daniel G. Shaw | 1989-10-10 |
| 4813493 | Hydraulic top drive for wells | Danial G. Shaw | 1989-03-21 |