Takao Fukushima

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Funabashi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Transmission device
- Patent number 8,306,066
- Issue date Nov 6, 2012
- Hitachi, Ltd.
- Masatoshi Shibasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface board and optical transmission equipment
- Patent number 8,149,868
- Issue date Apr 3, 2012
- Hitachi, Ltd.
- Hidemasa Narita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system and signal speed converting apparatus
- Patent number 7,769,257
- Issue date Aug 3, 2010
- Hitachi, Ltd.
- Nobuhiko Kikuchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Path switching method, path switching apparatus and nodes of UPSR
- Patent number 6,205,562
- Issue date Mar 20, 2001
- Hitachi, Ltd.
- Takao Fukushima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Path switching method, path switching apparatus and nodes of UPSR
- Patent number 6,038,678
- Issue date Mar 14, 2000
- Hitachi, Ltd.
- Takao Fukushima
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
TRANSMISSION DEVICE
- Publication number 20100111111
- Publication date May 6, 2010
- Hitachi, Ltd.
- Masatoshi SHIBASAKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION SYSTEM AND SIGNAL SPEED CONVERTING APPARATUS
- Publication number 20090116839
- Publication date May 7, 2009
- Hitachi Communications Technologies, Ltd.
- Nobuhiko Kikuchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
INTERFACE BOARD AND OPTICAL TRANSMISSION EQUIPMENT
- Publication number 20080232818
- Publication date Sep 25, 2008
- Hidemasa Narita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE