Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5399407 | Magnetic recording medium | Hideo Hatanaka, Fumio Echigo | 1995-03-21 |
| 5342668 | Magnetic recording medium having improved electromagnetic conversion characteristics and durability | Fumio Echigo, Masahiro Saida, Naoko Mizuno, Hideo Hatanaka | 1994-08-30 |
| 4472336 | Method of manufacturing video disc | Kazuhisa Morimoto | 1984-09-18 |