Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839234 | Polypropylene film | Seiichiro Ima | 1989-06-13 |
| 4820775 | Alpha-olefin block copolymer particles and process for the production thereof | Akinobu Shiga, Hajime Sadatoshi, Hiroyuki Kora, Toshio Sasaki, Junpei Kojima +2 more | 1989-04-11 |