Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872532 | Signal transmission method and system in elevator equipment | Toshimitsu Tobita, Hiromi Inaba, Masachika Yamazaki, Yuzo Morita, Toshiki Kajiyama +2 more | 1989-10-10 |
| 4872805 | Water powered device | Kotaro Horiuchi | 1989-10-10 |