Inventor
ISHIWATARI JUNICHI
JP11 patents
Patents
11 patentsUS6487686B1Nov 26, 2002
Error correction method and transmission apparatus
FUJITSU LTD65 citations95
US5446725AAug 29, 1995
Method of changing over path switch in optical transmission device
FUJITSU LTD73 citations95
US5754545AMay 19, 1998
Add-drop multiplexer with enhancement of accessibility to signals in different hierarchical levels and flexibility in various services and circuit setting operations
FUJITSU LTD24 citations92
US6201788B1Mar 13, 2001
Transmission device and system having the same
FUJITSU LTD32 citations91
US6728925B2Apr 27, 2004
Error correcting method and apparatus
FUJITSU LTD14 citations83
US5504761AApr 2, 1996
Apparatus for detecting error in a communications line
FUJITSU LTD8 citations73
US6642845B2Nov 4, 2003
Signal transmitter and signal quality monitoring device
FUJITSU LTD9 citations72
US5574719ANov 12, 1996
Transmission system
FUJITSU LTD7 citations72
US5319488AJun 7, 1994
Terminal equipment and optical communication system using the same
FUJITSU LTD9 citations72
US6252502B1Jun 26, 2001
Alarm detection apparatus
FUJITSU LTD1 citations47
US7020395B2Mar 28, 2006
Optical transmission apparatus monitoring optical performance
FUJITSU LTD0 citations38