Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5233794 | Rotary tool made of inorganic fiber-reinforced plastic | Yoshifumi Kikutani, Isao Tajima, Kazuo Sato | 1993-08-10 |
| 4623290 | Externally threaded fiber-reinforced plastic member and a method of producing the same | Yukio Otaki | 1986-11-18 |
| 4568582 | Internally threaded fiber-reinforced plastic member and a method of producing the same | Yukio Otaki | 1986-02-04 |
| 4465399 | Artificial reef assembly construction and a method | Shozo Akasaka | 1984-08-14 |
| 4439059 | Artificial reef unit | Shozo Akasaka | 1984-03-27 |