Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886379 | Cage for ball bearings | — | 1989-12-12 |
| 4850722 | Antifriction bearing with pulse ring for measurement of speed rotation | — | 1989-07-25 |
| 4813795 | Highly loaded case hardened ring | Martin Grehn | 1989-03-21 |