Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6050634 | Device for adjusting height of an armrest for chair | Hideyuki Yamagishi, Masayuki Ozawa, Kohichi Ogura | 2000-04-18 |
| 5944386 | Armrest device for chair | Hideyuki Yamagishi, Masayuki Ozawa, Kohichi Ogura | 1999-08-31 |