Issued Patents 2020
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10766742 | Hydraulic elevator safety device, and method for detecting open-door travel abnormality in hydraulic elevator | — | 2020-09-08 |
HI
Hirofumi Ikai
Overall (2020): #450,602 of 565,922Top 80%
1
Patents 2020