Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5116504 | Organic polymer separation membrane having fluorene skeleton and oxygen enrichment device utilizing same | Masao Sakashita, Tetsuo Sakamoto, Shingo Kazama, Yoshiyuki Harada, Takero Teramoto +2 more | 1992-05-26 |
| 4975190 | Organic polymer separation membrane having fluorene skeleton and oxygen enrichment device utilizing same | Masao Sakashita, Tetsuo Sakamoto, Shingo Kazama, Yoshiyuki Harada, Takero Teramoto +2 more | 1990-12-04 |
| 4968331 | Organic polymer separation membrane having fluorene skeleton and oxygen enrichment device utilizing same | Masao Sakashita, Tetsuo Sakamoto, Shingo Kazama, Yoshiyuki Harada, Takero Teramoto +2 more | 1990-11-06 |