Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4595457 | Oil-impregnatable insulating board | Ryota Nishiyama, Masahiro Amano, Yutaka Gamou, Hidenori Kawakami | 1986-06-17 |
| 4519873 | Process for producing fibrous sheet | Masahiro Amano, Ryota Nishiyama, Masaoki Nozaki | 1985-05-28 |
| 4448921 | Rock wool composite material | Eisuke Yamaya, Osamu Yamamoto, Takashi Koike | 1984-05-15 |
| 4273825 | Electric insulating sheet | Ryota Nishiyama, Takashi Koike | 1981-06-16 |
| 4259398 | Electrical insulating material | Ryota Nishiyama, Masaoki Nozaki | 1981-03-31 |