Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860316 | Multilevel amplitude modulation and demodulation communication system | Sadao Takenaka, Yoshihito Aono, Takanori Iwamatsu, Morihiko Minowa, Hiroshi Nakamura | 1989-08-22 |