Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7225875 | Multi-layered wellbore junction | David Joe Steele, Hendrik M. Stoltz, Gerald Edward Kent | 2007-06-05 |
| 6112835 | Drilling apparatus having a radially displaceable reamer | Edward F. Grafe, James A. Mantooth | 2000-09-05 |