Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665811 | Alkenylsuccinic acid emulsion sizing agent (2) | Sadao Kotsuka, Takeshi Kouchi | 1997-09-09 |
| 5639812 | Alkenylsuccinic acid emulsion sizing agent (1) | Sadao Kotsuka, Takeshi Kouchi | 1997-06-17 |