Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888808 | Digital equalizer apparatus enabling separate phase and amplitude characteristic modification | Seiichi Ishikawa, Katsuaki Satoh, Akihisa Kawamura | 1989-12-19 |
| 4867220 | Sunshade assembly of motor vehicle | Hisato Tatsumi | 1989-09-19 |