Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5976433 | Polyvinyl alcohol-based hollow fiber membrane and process for producing the same | Kensaku Komatsu | 1999-11-02 |
| 5789081 | Polyvinyl alcohol-based hollow fiber membrane and process for producing the same | Kensaku Komatsu | 1998-08-04 |
| 4725483 | Copolyester film and a method for production thereof | Masao Ishii, Takayuki Okamura, Keishiro Igi, Yoshito Hamamoto | 1988-02-16 |
| 4568444 | Chemical substance measuring apparatus | Michihiro Nakamura, Makoto Yano, Hidehiko Ikeya, Hiroshi Tsurumi, Yoshito Hamamoto | 1986-02-04 |