Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968971 | Method of spot welding parts of an electromagnetic bell unit | Junichi Aizawa, Satoru Yamauchi, Shoichiro Kumazawa, Tomohiro Wada | 1990-11-06 |
| 4912453 | Electromagnetic bell unit, its fitting structure and a method of welding the bell and the yoke of the unit | Junichi Aizawa, Satoru Yamauchi, Shoichiro Kumazawa, Tomohiro Wada | 1990-03-27 |