Inventor
KUWANO SHINICHI
JP4 patents
Patents
4 patentsUS6975811B1Dec 13, 2005
Optical one-to-one protection switching apparatus
HITACHI LTD15 citations83
US6434286B2Aug 13, 2002
Optical signal switching apparatus
HITACHI LTD12 citations72
US6229932B1May 8, 2001
Optical signal switching apparatus
HITACHI LTD12 citations71
US6334009B1Dec 25, 2001
Optical signal switching apparatus
HITACHI LTD0 citations49