Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4426363 | Process for extracting alumina from aluminous ores | Koichi Yamada, Takuo Harato, Hisakatsu Kato | 1984-01-17 |
| 4364919 | Process for producing coarse grains of aluminum hydroxide | Koichi Yamada, Takuo Harato, Hisakatsu Kato | 1982-12-21 |
| 4311486 | Process for producing coarse grains of aluminum hydroxide | Koichi Yamada, Takuo Harato, Hisakatsu Kato | 1982-01-19 |
| 4222992 | Process for the removal of sulfur oxides from exhaust gases using slurry of red mud containing calcium ion | Koichi Yamada, Takuo Harato | 1980-09-16 |