Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4309312 | Manufacture of spherical alumina from gibbsite | Shizuo Takumi, Toshio Hashimoto | 1982-01-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4309312 | Manufacture of spherical alumina from gibbsite | Shizuo Takumi, Toshio Hashimoto | 1982-01-05 |