Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822541 | Method of producing a porous ceramic panel | Satoru Nagai, Kazuo Imahashi, Yoshio Nagaya, Shigeo Yoshida, Takatoshi Miyazawa | 1989-04-18 |
| 4797319 | Glazed cement product and method for manufacturing thereof | Shigeo Yoshida, Shozo Harada, Tetsuya Koide, Manabu Hasegawa | 1989-01-10 |