Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11472670 | Safety gear for an elevator | Seiji Watanabe, Mitsuhiro Yamazumi, Masayuki Kakio | 2022-10-18 |
| 11230457 | Elevator apparatus | Seiji Watanabe, Kotaro Fukui, Eiji Ando, Shiro Ikeda | 2022-01-25 |