Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5333832 | Blowout preventer with removable packer | Leroy E. Bartholomew, David Callahan | 1994-08-02 |
| 5294088 | Variable bore packer for a ram-type blowout preventer | David J. McWhorter | 1994-03-15 |