Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6336627 | Suspension unit having a magneto-spring | Etsunori Fujita, Yasuhide Takata, Kazuyoshi Chizuka | 2002-01-08 |
| 6315364 | Cushion and seat each having net-like skin | Etsunori Fujita, Shigeki Wagata, Masaki Nishino, Yumi Ogura, Kazuyoshi Chizuka +6 more | 2001-11-13 |
| 6084329 | Vibration mechanism having a magnetic spring | Etsunori Fujita, Yutaka Sakamoto, Hiroki Honda, Yasuhide Takata, Kazuyoshi Chizuka | 2000-07-04 |