Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835198 | Polymer composition and textile sizing agent made therefrom | Hiroji Kohno, Kohji Moritani, Toshiaki Sato, Takuji Okaya | 1989-05-30 |
| 4818787 | Process for producing polyvinyl ester having a high degree of polymerization and process for producing polyvinyl alcohol having a high degree of polymerization | Toshiaki Sato, Takuji Okaya | 1989-04-04 |
| 4818788 | Process for producing polyvinyl ester having a high degree of polymerization and process for producing polyvinyl alcohol having a high degree of polymerization | Toshiaki Sato, Ken Yuki, Takuji Okaya | 1989-04-04 |