Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4662942 | Cement additives | Jiro Yasumura, Mitsuo Nagano | 1987-05-05 |
| 4655838 | Cement additive composition | Fumitada Yamamoto, Hideharu Shimokawa | 1987-04-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4662942 | Cement additives | Jiro Yasumura, Mitsuo Nagano | 1987-05-05 |
| 4655838 | Cement additive composition | Fumitada Yamamoto, Hideharu Shimokawa | 1987-04-07 |