Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7504001 | Method for producing paper and agent for improving yield | Masanori Kosuga, Yoshiaki Koga | 2009-03-17 |
| 7482417 | Papermaking chemical, method for manufacturing same, and paper containing same | Toshitsugu Kiyosada, Akira Endou, Satoru Iwata | 2009-01-27 |
| 5115065 | Polymeric papermaking additive | Mitsuhiro Murata | 1992-05-19 |
| 5013775 | Sizing composition and sizing method | Hideo Oikawa, Kiyoshi Iwai, Mayumi Narushima | 1991-05-07 |
| 4717758 | Papermaking additive | Mayumi Narushima | 1988-01-05 |