Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822489 | Aromatic polysulfone type resin hollow fiber membrane and a process for producing the same | Yasuo Hashino | 1989-04-18 |
| 4813983 | Composite membrane for use in gas separation | Toshibumi Fukai | 1989-03-21 |
| 4481260 | Aromatic polysulfone type resin hollow fiber membrane and process for producing the same | — | 1984-11-06 |
| 4399035 | Polyvinylidene fluoride type resin hollow filament microfilter and process for producing the same | Takao Yamada | 1983-08-16 |
| 4229297 | Method of separating oil from oil-containing liquid | Takao Yamada, Yoshinao Doi | 1980-10-21 |