Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7637357 | Elevator apparatus with sheave rotational speed difference determination for detecting an abnormality | Hiroyuki Nakagawa, Yoshikatsu Hayashi, Eiji Ando, Atsushi Mitsui | 2009-12-29 |