Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877688 | Ink-jet recording sheet | Hideaki Senoo, Yasuo Satoh, Mamoru Sugaya | 1989-10-31 |
| 4814018 | Filler for noise insulating material and noise insulating material using same | Hidekazu Tsurumaru, Nobuhiro Fujio, Toshio Nishizaki, Isao Negisi | 1989-03-21 |