Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6336351 | Method of manufacturing spline shaft | Akio Kobayashi | 2002-01-08 |
| 5865055 | Spline forming die | — | 1999-02-02 |
| 5730018 | Method of forming internal spline shaft | Akio Kobayashi | 1998-03-24 |