Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4985891 | ISDN system having subscriber line multiplexer with means for establishing different data links through D-channels on subscriber line and high rate transmission line | Ryuhei Fujiwara, Takashi Asano | 1991-01-15 |