Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8037639 | Door opening/closing device | Hirofumi Watanabe, Kazuhito Yokomori, Nobuo Sugawara | 2011-10-18 |
| 8007027 | Door operating apparatus, electromagnetic clutch, and coupling mechanism | Hirofumi Watanabe | 2011-08-30 |