Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4190454 | Cement retarder and rapid hardening cement containing the same | Hirosi Yamagisi, Koji Nakagawa, Minoru Sirasawa | 1980-02-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4190454 | Cement retarder and rapid hardening cement containing the same | Hirosi Yamagisi, Koji Nakagawa, Minoru Sirasawa | 1980-02-26 |