Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6143369 | Process of impregnating substrate and impregnated substrate | Yoshihisa Sugawa, Yoshinobu Marumoto, Joji Sakakibara, Ken-ichi Shinotani, Kohei Kotera +3 more | 2000-11-07 |
| 4738890 | Resin-impregnated base and method of manufacturing same | Tokio Yoshimitsu, Hideto Misawa, Motoyuki Akamatsu | 1988-04-19 |