Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8011478 | Elevator vibration damping system having damping control | — | 2011-09-06 |
| 7992688 | Door device for an elevator | Masayuki Sugahara, Naotoshi Ito | 2011-08-09 |
| 7909141 | Elevator vibration damping system having damping control | — | 2011-03-22 |