Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873352 | Transparent aqueous tin compound solution | Hideo Naka | 1989-10-10 |
| 4871501 | Process for melt spinning aromatic polyester | Hiroaki Sugimoto, Kazuo Hayatsu, Seiji Takao | 1989-10-03 |
| 4865790 | Process for producing aromatic polyester fiber | Hiroaki Sugimoto, Kazuo Hayatsu, Seiji Takao, Jun Takagi | 1989-09-12 |