Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849990 | Digital communication system | Fumio Ikegami, Susumu Yoshida, Tsutomu Takeuchi, Masaaki Sasada | 1989-07-18 |
| 4841547 | Digital communication system | Fumio Ikegami, Susumu Yoshida, Tsutomu Takeuchi | 1989-06-20 |
| 4807252 | Digital communication system | Fumio Ikegami, Susumu Yoshida, Tsutomu Takeuchi | 1989-02-21 |