Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856041 | X-ray detector system | Sigismund Klein | 1989-08-08 |
| 4794846 | Proportional action valve with a biased spring unproportionately variable to the load pressure | Heinz-Joachim Von Der Ley, Bernd Henchoz | 1989-01-03 |