Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5318826 | Information recording medium comprising a silver nalide light sensitive layer, and two superposed magnetic layers which differ in coercivity | Yoshitaka Yasufuku, Koichi Nagayasu | 1994-06-07 |
| 5294525 | Silver halide photographic light-sensitive material capable of magnetic-recording | Yoshitaka Yasufuku, Eiichi Ueda | 1994-03-15 |
| 5188907 | Magnetic recording medium | Setsuko Kawahara, Yasushi Nakano, Yuji Shimizu | 1993-02-23 |
| 5055349 | Magnetic recording medium | Yoshitaka Yasufuku | 1991-10-08 |
| 4713293 | Magnetic recording media | Masao Asano, Ryosuke Isobe, Hiroaki Yamagishi | 1987-12-15 |
| 4710427 | Process for treating magnetic metal power | Masao Asano, Hideyuki Anzai, Yoshitaka Yasufuku | 1987-12-01 |
| 4661794 | Mounting structure for resistors used for controlling the running of industrial vehicles | — | 1987-04-28 |
| 4550054 | Magnetic recording medium | Masao Asano, Mitsutaka Arai | 1985-10-29 |