Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5245001 | Aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same | Takahiro Furuhashi, Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi +1 more | 1993-09-14 |
| 5092934 | Aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same | Takahiro Furuhashi, Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi +1 more | 1992-03-03 |
| 4936918 | Aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same | Takahiro Furuhashi, Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi +1 more | 1990-06-26 |
| 4650522 | Concrete admixture | Tsutomu Teraji, Kazushige Kawada, Toru Takeuchi, Shinichi Sugita, Hideo Yaqi | 1987-03-17 |