Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876007 | Plate-type filter cartridge with internal support | Kyoichi Naruo, Masahiro Etoh, Masao Tsuruta, Ikuro Moriya, Masanori Ishiguro +1 more | 1989-10-24 |
| 4871456 | Stacked filter cartridge with porous filter support | Kyoichi Naruo, Masahiro Etoh, Ikuro Moriya | 1989-10-03 |
| 4840733 | Fine porous membrane and process for producing the same | Jun Sasaki, Atsushi Adachi, Kyoichi Naruo, Yukio Shinagawa | 1989-06-20 |