Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4356232 | Method for producing magnetic recording medium | Haruo Masuda, Nobutaka Yamaguchi, Masaaki Fujiyama | 1982-10-26 |
| 4338643 | Magnetic recording disc and method of making same | — | 1982-07-06 |
| 4337288 | Magnetic recording medium | Haruo Takenaka, Masaaki Fujiyama | 1982-06-29 |
| 4324177 | Calender roll for supercalender | Nobuo Tsuji, Masaaki Fujiyama, Hiromi Nakahara, Keiji Tanaka, Isao Yamamoto | 1982-04-13 |