Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4551497 | Method of producing surface-treated barium sulfate | Koichi Otu, Hiroshi Fukumoto | 1985-11-05 |
| 4505755 | Method of producing surface-treated barium sulfate | Koichi Otu, Hiroshi Fukumoto | 1985-03-19 |