Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4959997 | Magnetic float for magnetic sensor | Mituo Yamamoto | 1990-10-02 |
| 4857188 | Iron powder attracting magnet | Eizi Kosugi | 1989-08-15 |
| 4810148 | Drain bolt | Eizi Kosugi | 1989-03-07 |