Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7912096 | Add/drop multiplexer and interface | — | 2011-03-22 |
| 7672341 | Transmission apparatus and reception interface apparatus | — | 2010-03-02 |
| 7417878 | Distributed power supply and method of recovering from error | Hideaki Arao | 2008-08-26 |
| 7154894 | ATM cell service apparatus accomodating an ATM cell in an optical asynchronous communications network through a North America asynchronous communications network | — | 2006-12-26 |
| 6657953 | Signal loopback device | Masanori Hiramoto, Hidetaka Kawahara, Akihiko Oka | 2003-12-02 |
| 6498794 | Transmitter with cell switching function | Yoshitaka Taki | 2002-12-24 |
| 6192437 | Transmission apparatus with control circuit/relay within each card providing connection to related card output depending on related slot ID/ redundancy/non-redundancy, working/protection signals | Akihiko Oka | 2001-02-20 |
| 6188701 | Apparatus and method for interfacing between communication networks | Akihiko Oka | 2001-02-13 |