Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885333 | Polyvinyl chloride resin composition having improved thermal stability and a method for the preparation thereof | Tokuji Abe | 1989-12-05 |
| 4845174 | Process for preparing a vinyl chloride polymer | Junichi Watanabe, Hajime Kitamura | 1989-07-04 |
| 4826940 | Method for suspension polymerization of vinyl chloride monomer | Yoshitaka Okuno, Junichi Watanabe | 1989-05-02 |
| 4806962 | Automatic developing apparatus | Makoto Uchida, Hiroyuki Kakuhari, Wataru Isogawa | 1989-02-21 |