Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871601 | Optical information recording carrier | Kyo Miura, Hiroyuki Sugata, Yoshihiro Oguchi | 1989-10-03 |
| 4871649 | Optical recording medium and optical recording method using the same | Hiroyuki Imataki, Mizuho Hiraoka, Sachiko Ichikawa, Yoshihiro Ogawa | 1989-10-03 |