Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7701892 | Switching complex architecture and operation | David X. Chen | 2010-04-20 |
| 6700868 | Switching redundancy control | Alexander A. Smith, Edward Y. Qian, Daniel Mieczkowski, David X. Chen | 2004-03-02 |
| 6584119 | Dialable data services/TDM bandwidth management | Hamid Rezaie, Samuel Lisle, Kazuhiko Taniquchi, David X. Chen, Edward T. Sullivan +2 more | 2003-06-24 |
| 6396847 | Dialable data services/TDM bandwidth management | Hamid Rezaie, Samuel Lisle, Kazuhiko Taniguchi, David X. Chen, Edward T. Sullivan +2 more | 2002-05-28 |
| 6359858 | Switching redundancy control | Alexander A. Smith, Edward Y. Qian, Daniel Mieczkowski, David X. Chen | 2002-03-19 |
| 5805568 | Add/drop multiplexer for supporting fixed length cell | — | 1998-09-08 |
| 5796717 | System for switching from working units to stand-by units | Takashi Wakabayashi | 1998-08-18 |
| 5757871 | Jitter suppression circuit for clock signals used for sending data from a synchronous transmission network to an asynchronous transmission network | Takahiro Furukawa | 1998-05-26 |
| 5754545 | Add-drop multiplexer with enhancement of accessibility to signals in different hierarchical levels and flexibility in various services and circuit setting operations | Akihiko Oka, Kazuo Takatsu, Hideaki Mochizuki, Junichi Ishiwatari, Koji Iwamoto | 1998-05-19 |
| 5504761 | Apparatus for detecting error in a communications line | Junichi Ishiwatari | 1996-04-02 |
| 5325366 | Alarm system for station in a communications system using asynchronous third-digital-stage signal | — | 1994-06-28 |
| 5014261 | System for switching from working units to stand-by units | Takashi Wakabayashi | 1991-05-07 |