Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4218366 | Condensation product of 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxydiphenylsulfone sulfonic acid and a lower aldehyde and method of preparation | Akio Kobayashi, Yoshiyuki Shimohiro, Yoshiaki Murakami | 1980-08-19 |