Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863110 | Magnetic tape winding method and apparatus | Masaaki Sakaguchi, Akihisa Kita | 1989-09-05 |
| 4844370 | Method and device for winding magnetic tape using magnetic alignment | Masaaki Sakaguchi, Mitsunobu Usui, Hiroshi Chikamasa, Seiji Kiuchi | 1989-07-04 |
| 4828197 | Method and device for winding magnetic tape using magnetic alignment | Masaaki Sakaguchi | 1989-05-09 |