Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615921 | Apparatus and method for remote adjustment of drill string centering to prevent damage to wellhead | Norman Brammer, Charles E. Jennings | 2003-09-09 |
| 6394186 | Apparatus for remote adjustment of drill string centering to prevent damage to wellhead | Norman Brammer, Charles E. Jennings | 2002-05-28 |