Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878546 | Self-aligning top drive | Billy MacCline | 1989-11-07 |
| 4813493 | Hydraulic top drive for wells | Billy MacCline | 1989-03-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878546 | Self-aligning top drive | Billy MacCline | 1989-11-07 |
| 4813493 | Hydraulic top drive for wells | Billy MacCline | 1989-03-21 |