Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6911494 | Cement admixture and cement composition | Akihiko Yamashita, Hiromichi Tanaka, Tsuyoshi Hirata, Yoshiyuki Onda | 2005-06-28 |
| 6864337 | Polycarboxylic acid copolymer, production method and use thereof | Tsutomu Yuasa, Tomotaka Nishikawa, Noboru Sakamoto, Tsuyoshi Hirata, Hiroko Izukashi +3 more | 2005-03-08 |