Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885646 | Digital recorder using partial response method | Takahito Seki | 1989-12-05 |
| 4862296 | PCM signal reproducing apparatus with adjustable phase lock loop circuitry | Noboru Murabayashi | 1989-08-29 |