Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347771 | High damping device for seismic response controlled structure | Koji Ishii, Motoichi Takahashi, Yoshinori Matsunaga, Naoki Niwa, Jun Tagami +2 more | 1994-09-20 |
| 5311709 | Variable damping device for seismic response controlled structure | Yoshinori Matsunaga, Naoki Niwa, Takayuki Mizuno, Hironori Sasaki, Ichiro Arimoto +1 more | 1994-05-17 |