Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4540627 | Magnetic recording medium | Akio Ishizawa, Toshio Hukaya, Tatuo Takeuchi | 1985-09-10 |
| 4511617 | Magnetic recording medium | Shozo Hideyama, Akio Ishizawa, Minoru Hashimoto | 1985-04-16 |
| 4395435 | Method for manufacturing information recording medium | Hideo Sanpei, Kunio Matsuno, Shyoji Hirano | 1983-07-26 |