Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5237858 | Method for determining the unhydration ratio of cement contained in cement sludge | Yukio Ohsaki, Fumio Iwase | 1993-08-24 |
| 5209130 | Method for recycling wash residue of ready mixed concrete and system therefor | Yukio Ohsaki, Fumio Iwase | 1993-05-11 |
| 5178455 | Method for recycling wash residue of ready mixed concrete and system therefor | Yukio Ohsaki, Fumio Iwase | 1993-01-12 |