Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10807832 | Elevator device | Ken Miyakawa, Seiji Watanabe | 2020-10-20 |
| 10640331 | Elevator safety device and elevator system | Masayuki Kakio, Seiji Watanabe | 2020-05-05 |
| 10526170 | Elevator apparatus | Eiji Ando, Seiji Watanabe, Kotaro Fukui | 2020-01-07 |