Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842759 | Acicular process for producing particulate material | Kazuo Okamura, Ikuo Kitamura, Hideki Aomi, Katsushi Tokunaga, Yoshiyuki Shibuya +1 more | 1989-06-27 |
| 4840837 | Heat transfer medium | Noriatsu Tanaka, Masami Tokunaga, Tsuyoshi Tanaka, Keiichi Kikuchi | 1989-06-20 |