Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860010 | Automatic drift control circuit | — | 1989-08-22 |
| 4860316 | Multilevel amplitude modulation and demodulation communication system | Sadao Takenaka, Yoshihito Aono, Morihiko Minowa, Yoshimasa Daido, Hiroshi Nakamura | 1989-08-22 |