Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794846 | Proportional action valve with a biased spring unproportionately variable to the load pressure | Heinz-Joachim Von Der Ley, Reiner Schulz | 1989-01-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794846 | Proportional action valve with a biased spring unproportionately variable to the load pressure | Heinz-Joachim Von Der Ley, Reiner Schulz | 1989-01-03 |