Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7644808 | Door device of elevator | — | 2010-01-12 |
| 5636715 | Elevator door structure and method of adjusting the same | Yoshikatsu Hayashi | 1997-06-10 |
| 5165505 | Elevator landing door apparatus | Yoshikatsu Hayashi, Makoto Tomidokoro, Yoshinari Kuzuya | 1992-11-24 |
| 5156237 | Elevator landing door apparatus | Yoshikatsu Hayashi, Makoto Tomidokoro, Masaaki Murakami, Tetsuro Ogushi, Yutaka Noda | 1992-10-20 |