Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4244933 | Calcium carbonate particles and processes for preparing same | Setsuji Edagawa, Hisashi Hasegawa, Satoshi Kondo | 1981-01-13 |
| 4240870 | Filled paper | Setsuji Edagawa, Hisashi Hasegawa | 1980-12-23 |
| 4219590 | Method for improving calcium carbonate | Setsuji Edagawa, Yoshinaga Okamoto | 1980-08-26 |