Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870309 | Wiring device in direct current machine | — | 1989-09-26 |
| 4855631 | Brush holding device | Masaei Sato | 1989-08-08 |
| 4806025 | Holding device for automatic self-aligning ball metal | Akira Kamiyama, Yoshimasa Kimura | 1989-02-21 |