Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877535 | Iron dispersant for boiler water | Kenji Kobayashi, Ichiro Kaneko, Masahiro Kobayashi | 1989-10-31 |
| 4829132 | Resinous composition containing polyester resin, for coating use | Hirotoshi Umemoto, Hisaki Tanabe | 1989-05-09 |