Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864455 | Arrester disconnecting device | Tetsuro Shimomura, Mikio Mochizuki | 1989-09-05 |
| 4827463 | Disc memory device | Takeo Motoyoshi, Naoyuki Nakatsukasa, Tooru Yamashita | 1989-05-02 |