Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6825289 | Method for producing chemical reactive substance and polycarboxylic acid produced thereby | Masaya Yamamoto, Yoshiyuki Onda, Koichiro Nagare, Minoru Miyagawa | 2004-11-30 |
| 6727315 | Copolymer for cement admixtures and its production process and use | Masaya Yamamoto, Yoshiyuki Onda, Hiromichi Tanaka, Akihiko Yamashita, Tsuyoshi Hirata +1 more | 2004-04-27 |