Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867388 | Magnetic tape winding device | Masaaki Sakaguchi | 1989-09-19 |
| 4846420 | Magnetic tape loading method and apparatus | Masaaki Sakaguchi | 1989-07-11 |
| 4844370 | Method and device for winding magnetic tape using magnetic alignment | Masaaki Sakaguchi, Hiroshi Chikamasa, Keisuke Wakatsuki, Seiji Kiuchi | 1989-07-04 |
| 4817884 | Method and device for winding magnetic tape using magnetic alignment | Masaaki Sakaguchi, Akira Takagi | 1989-04-04 |