Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5245001 | Aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same | Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi, Toshikazu Adachi +1 more | 1993-09-14 |
| 5092934 | Aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same | Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi, Toshikazu Adachi +1 more | 1992-03-03 |
| 4936918 | Aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same | Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi, Toshikazu Adachi +1 more | 1990-06-26 |