Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5963000 | Object sensor system for automatic swing door | Ye Zengguang | 1999-10-05 |
| 5828302 | Door sensor with self-diagnosing function | Ye Zengguang, Shigeaki Sasaki | 1998-10-27 |
| 5739523 | Object sensor system for doors | Takashi Wada | 1998-04-14 |
| 5583405 | Automatic door opening and closing system | Masahiro Sai | 1996-12-10 |