Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876007 | Plate-type filter cartridge with internal support | Kyoichi Naruo, Sumio Ohtani, Masahiro Etoh, Masao Tsuruta, Ikuro Moriya +1 more | 1989-10-24 |
| 4814927 | Magnetic disk cartridge | Shoji Iwamoto, Akira Mizuta, Tadashi Irie | 1989-03-21 |
| 4796823 | Spool for photographic film | Mutsuo Akao, Hisao Endo, Toshio Sata | 1989-01-10 |