Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4894411 | Composite material and process for producing the same | Akane Okada, Masaya Kawasumi, Masao Kohzaki, Yoshitsugu Kojima, Toshio Kurauchi +1 more | 1990-01-16 |
| 4889885 | Composite material containing a layered silicate | Arimitsu Usuki, Tadashi Mizutani, Yoshiaki Fukushima, Kenzo Fukumori, Yoshitsugu Kojima +3 more | 1989-12-26 |