Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851504 | Cationically-dyeable, thermally-resistant copolyester fiber comprising quaternary phosphonium organic sulfonate groups | Togi Suzuki, Shinji Ohwaki, Setsuo Yamada, Hironori Yamada, Kohichi Iohara | 1989-07-25 |