Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834604 | Pipe moving apparatus and method | John C. Brittain, William P. Adelman, Joseph R. Woolslayer | 1989-05-30 |
| 4725179 | Automated pipe racking apparatus | Joseph R. Woolslayer, John C. Brittain | 1988-02-16 |
| 4615508 | Apparatus for skidding a load on a support | Leroy K. Peaster, John C. Brittain | 1986-10-07 |
| 4598509 | Method and apparatus for raising and lowering a telescoping mast | Homer J. Woolslayer, Dewayne G. Vogt | 1986-07-08 |
| 4587778 | Method and apparatus for erecting a drilling rig mast | Homer J. Woolslayer | 1986-05-13 |
| 4375892 | Oil well drilling rig mover | Joseph R. Woolslayer | 1983-03-08 |