Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839207 | Optical recording medium and process for producing the same | Toshihiko Yoshitomi, Yoshimitsu Kobayashi, Yoshiyuki Kisaka, Hidemi Yoshida, Takanori Tamura +1 more | 1989-06-13 |