Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864427 | Disk reproducing method and apparatus for disks with different video bandwidths | Hitoshi Kanamaru | 1989-09-05 |
| 4852074 | Method of measurement of crosstalk noise in playback information signal | Hiroshi Aoyama, Nobuyoshi Kuroda, Takumi Ito | 1989-07-25 |