Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868275 | Preparation of poly (arylene sulfide) from dihalo aromatic hydroxyl compound | Hiroshi Inoue, Satoshi Tomagou, Noriaki Emura | 1989-09-19 |
| 4845190 | Process for preparing polyarylene sulfides with recovery of carboxylic acid | Hiroshi Inoue, Noriaki Emura | 1989-07-04 |
| 4840986 | Process for producing a polyarylene sulfide | Hiroshi Inoue, Satoshi Tomagou, Noriaki Emura | 1989-06-20 |
| 4820801 | Polyphenylene sulfide containing covalently bonded chlorine in a reduced amount | Hiroshi Inoue, Masaaki Otsuru, Noriaki Emura | 1989-04-11 |
| D299336 | Hand microphone for transcriber | Akira Osanai, Yasuo Hattori | 1989-01-10 |