Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802985 | Porous water-treating material | Shuighi Sugimori | 1989-02-07 |
| 4801386 | Process of using a porous water-treating material | Shuichi Sugimori, Tadashi Matsuda, Shintaro Nakano, deceased, Sumito Saiki, Hideaki Habara | 1989-01-31 |