Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860316 | Multilevel amplitude modulation and demodulation communication system | Sadao Takenaka, Yoshihito Aono, Takanori Iwamatsu, Yoshimasa Daido, Hiroshi Nakamura | 1989-08-22 |
| 4809298 | Radio data transmission system | Toshiaki Sakane, Sadao Takenaka, Yoshihito Aono, Yoshimasa Daidoh | 1989-02-28 |