Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4956403 | Suppression of pressure water absorption of lightweight aggregate by aqueous dispersion therein of anionic polymers | Toshio Yonezawa, Takashi Iwashimizu, Yasuhiko Yoshioka, Koichi Ito, Kunio Sakaue | 1990-09-11 |