Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5085800 | Glycol dispersion of precipitated calcium carbonate | Shiro Minayoshi, Naofumi Saitoh, Toshio Higashi | 1992-02-04 |
| 5000871 | Gycol dispersion of calcium carbonate | Shiro Minayoshi, Naofumi Saitoh, Toshio Higashi | 1991-03-19 |
| 4725318 | Filler for paper-making and neutral paper-making process by the use thereof | Shiro Minayoshi, Naofumi Saitoh, Minoru Hanazaki, Hiroyuki Hisakuni | 1988-02-16 |