Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6820695 | Snap-lock seal for seal valve assembly | Earl Webb, Aimee Greening | 2004-11-23 |
| 6796377 | Anti-rotation apparatus for limiting rotation of cementing plugs | Charles Butterfield, Henry E. Rogers, Earl Webb | 2004-09-28 |