Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5660626 | Cement dispersing agent | Akira Ohta, Tomomi Sugiyama | 1997-08-26 |
| 5661206 | Fluidity control of cementitious compositions | Akira Ohta, Hideyuki Tahara, Tsuyoshi Hirata | 1997-08-26 |
| 5642702 | Generator set | Toshifumi Kouchi, Tadafumi Hirose | 1997-07-01 |