Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4917211 | Seismic isolator | Takao Yamada, Katsunori Kurabe, Koichi Shibata | 1990-04-17 |
| 4483426 | Coiled damper element | Toshio Nasu, Takao Yamada, Kazuo Yamashita, Tetsuo Eto | 1984-11-20 |