Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10955054 | Mechanical seal arrangement and well bore conveyor device | Peter Droscher, Andreas Pehl, Dieter Pfeil, Berthold Schulten, Glenn H. Schmidt | 2021-03-23 |
| 5037065 | Ball valve | Rudolf Hirz | 1991-08-06 |