Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4991163 | Optical information medium with sample mark area and multiple transcription prevention | Nobuhiro Tokushuku, Hitoshi Yanagihara, Katashi Hazama, Masaki Yoshii | 1991-02-05 |