Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876007 | Plate-type filter cartridge with internal support | Kyoichi Naruo, Sumio Ohtani, Masahiro Etoh, Ikuro Moriya, Masanori Ishiguro +1 more | 1989-10-24 |
| 4841403 | Lid spring locking structure in a magnetic tape cassette | Seiji Kiuchi, Akira Honjyoh, Kengo Oishi, Osamu Suzuki | 1989-06-20 |