Issued Patents 1994
Showing 1–1 of 1 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, Yasuhisa Yamauchi | 1994-06-07 |