Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5333832 | Blowout preventer with removable packer | Eric G. Childs, David Callahan | 1994-08-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5333832 | Blowout preventer with removable packer | Eric G. Childs, David Callahan | 1994-08-02 |