Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5122191 | Admixture and cement composition using same | Masahiro Morozumi, Yasuhiko Yoshioka, Masahiro Yamashita, Kenji Hayashi, Yukihiro Tanigawa +2 more | 1992-06-16 |
| 4956403 | Suppression of pressure water absorption of lightweight aggregate by aqueous dispersion therein of anionic polymers | Toshio Yonezawa, Yasuhiko Yoshioka, Koichi Ito, Kunio Sakaue, Tetsuo Nakase | 1990-09-11 |