Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8851239 | Elevator tension member monitoring device | — | 2014-10-07 |
| 6443265 | Safety device of the elevator door | Motohiro Higashide, Sai Seii | 2002-09-03 |
| 6105729 | Elevator car operating panel | Shunsuke Tanaka | 2000-08-22 |
| 5641951 | Elevator door safety device | Zhengwei Cai | 1997-06-24 |