Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844370 | Method and device for winding magnetic tape using magnetic alignment | Masaaki Sakaguchi, Mitsunobu Usui, Hiroshi Chikamasa, Keisuke Wakatsuki | 1989-07-04 |
| 4841403 | Lid spring locking structure in a magnetic tape cassette | Masao Tsuruta, Akira Honjyoh, Kengo Oishi, Osamu Suzuki | 1989-06-20 |
| 4828196 | Device for winding magnetic tape using magnetic alignment | Masaaki Sakaguchi | 1989-05-09 |