Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4927611 | Lightweight magnesia clinker and process for the preparation of the same | Kosei Yamamoto, Toshiichi Iwamoto | 1990-05-22 |
| 4681863 | High-density magnesia-calcia clinker and process for production thereof | Kosei Yamamoto, Yo Arita | 1987-07-21 |
| 4585743 | High density magnesia clinker and process for its production | Kosei Yamamoto | 1986-04-29 |