Inventor
KAKIZAKI SUNAO
JP9 patents
Patents
9 patentsUS6933852B2Aug 23, 2005
Optical switching apparatus and optical communication network system
HITACHI LTD18 citations92
US5627923AMay 6, 1997
Three-dimensional opto-electric integrated circuit using optical wiring
HITACHI LTD33 citations91
US6975811B1Dec 13, 2005
Optical one-to-one protection switching apparatus
HITACHI LTD15 citations83
US6839480B2Jan 4, 2005
Optical switching apparatus, optical transmission system and method of setting up for optical signal route
HITACHI LTD6 citations73
US6778725B1Aug 17, 2004
Optical switching apparatus, optical transmission system and method of setting up for optical signal route
HITACHI LTD9 citations73
US6434286B2Aug 13, 2002
Optical signal switching apparatus
HITACHI LTD12 citations72
US7356257B2Apr 8, 2008
Optical switching apparatus and optical communication network system
HITACHI LTD4 citations62
US7206475B2Apr 17, 2007
Optical switching apparatus, optical transmission system and method of setting up for optical signal route
HITACHI LTD2 citations62
US7542672B2Jun 2, 2009
Optical switching apparatus with optical reflection monitor and reflection monitoring system
HITACHI LTD4 citations54