Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4499121 | Method of preparing a magnetic recording medium with a calendering treatment | Nobutaka Yamaguchi, Masaaki Fujiyama, Sugihiko Tada, Katsumi Ryoke, Masahiro Utsumi +1 more | 1985-02-12 |
| 4497864 | Magnetic recording medium | Katsumi Ryoke, Nobutaka Yamaguchi, Takashi Yoneyama | 1985-02-05 |
| 4466164 | Supercalendering apparatus | Isao Yamamoto, Keiji Tanaka | 1984-08-21 |
| 4450199 | Magnetic recording medium | Masaaki Fujiyama, Goro Akashi | 1984-05-22 |
| 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 |
| 4241368 | Magnetic sheet recorder with a magnetic sheet surface treating means | Tatsuji Kitamoto | 1980-12-23 |