Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5224595 | Package of cement mixing material | Kenji Sugimoto, Koichi Nagase, Toshihiro Okada, Takehiko Kurusu | 1993-07-06 |
| 4786331 | Cement dispersion agent | Shigeyuki Ueda, Kazuaki Yamaguchi | 1988-11-22 |