Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862296 | PCM signal reproducing apparatus with adjustable phase lock loop circuitry | Keiji Kanota | 1989-08-29 |
| 4814900 | Tracking control apparatus using pilot signals of different frequencies | Shoji Nemoto | 1989-03-21 |