Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6651748 | Methods and apparatus for creating a downhole buoyant casing chamber | Henry E. Rogers | 2003-11-25 |
| 6505685 | Methods and apparatus for creating a downhole buoyant casing chamber | Henry E. Rogers | 2003-01-14 |