Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4343831 | Process for producing magnetic recording medium | Goro Akashi, Masaaki Fujiyama, Yasuyuki Yamada | 1982-08-10 |
| 4336308 | Magnetic recording media | Yasuyuki Yamada, Kenichi Masuyama | 1982-06-22 |
| 4324177 | Calender roll for supercalender | Masaaki Fujiyama, Hiromi Nakahara, Eiichi Tadokoro, Keiji Tanaka, Isao Yamamoto | 1982-04-13 |