Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844480 | Pressure sensitive shaft sealing ring | — | 1989-07-04 |
BG
Bernhard Gralka
Overall (1989): #129,702 of 140,708Top 95%
1
Patents 1989