Issued Patents 1994
Showing 1–2 of 2 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 |