Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8574667 | Methods of forming coatings upon wellbore tools | Hendrik John, Erik Bartscherer | 2013-11-05 |
| 7255480 | Diamond bearing with cooling/lubrication channels | Hendrik John | 2007-08-14 |