Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828619 | Air-entraining agent for flyash cement composition | Souji Matsushita, Setsuro Shimizu, Toru Takeuchi | 1989-05-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828619 | Air-entraining agent for flyash cement composition | Souji Matsushita, Setsuro Shimizu, Toru Takeuchi | 1989-05-09 |