Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357536 | Method and apparatus for measuring fluid density and determining hole cleaning problems | Hartmut Schrader | 2002-03-19 |
| 6257354 | Drilling fluid flow monitoring system | Hartmut Schrader | 2001-07-10 |