Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6048135 | Modular offshore drilling unit and method for construction of same | Frank B. Williford | 2000-04-11 |
| 5855455 | Submersible and semi-submersible dry lift carrier and method of operation for carrying a drilling rig and platform | Frank B. Williford | 1999-01-05 |