Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839861 | Information recording medium rewritable by utilizing two metastable phases of a recording layer and method using the same | Sumio Ikegawa, Shuichi Komatsu, Shinji Arai, Nobuaki Yasuda | 1989-06-13 |