Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657953 | Signal loopback device | Hidetaka Kawahara, Keiichiro Tsukamoto, Akihiko Oka | 2003-12-02 |
| 5471476 | Synchronous payload pointer processing system in digital data transmission network | — | 1995-11-28 |
| 5136587 | Digital signal multiplexing apparatus and demultiplexing apparatus | Yuji Obana, Masayuki Tanaka | 1992-08-04 |
| 5001711 | Complex multiplexer/demultiplexer apparatus | Yuji Obana | 1991-03-19 |