Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4790486 | Process for preparation of paper-making hydrous silicic acid filler | Kunihiko Aida, Shinji Seto, Takao Suzuki | 1988-12-13 |
| 4764252 | Process for pulping lignocellulosic material with a preoxidized alkaline sulfide pulping liquor containing a cyclic organic compound | Yoichi Shin, Isao Wada, Junichiro Kido | 1988-08-16 |