Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888728 | Multipoint link data-transmission control system | Hiroaki Yamashita, Toshio Nishida | 1989-12-19 |
| 4885765 | Telephone system with stimulus operation or default operation | — | 1989-12-05 |