Inventor
FUKASHIRO YASUYUKI
JP33 patents
⚠️ This page may combine multiple inventors who share the name “FUKASHIRO YASUYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
19 patentsUS6933852B2Aug 23, 2005
Optical switching apparatus and optical communication network system
HITACHI LTD18 citations92
US6362905B1Mar 26, 2002
Optical crossconnect apparatus and optical transmission system
HITACHI LTD36 citations92
US6341032B1Jan 22, 2002
Method and system for reducing optical surge
HITACHI LTD24 citations92
US7877011B2Jan 25, 2011
Optical switch and optical crossconnect apparatus
HITACHI LTD10 citations84
US6987899B2Jan 17, 2006
Optical switching apparatus and optical switching method
HITACHI LTD11 citations83
US7215843B2May 8, 2007
Optical switching apparatus and optical switching method
HITACHI LTD9 citations73
US6839480B2Jan 4, 2005
Optical switching apparatus, optical transmission system and method of setting up for optical signal route
HITACHI LTD6 citations73
US6813445B2Nov 2, 2004
Optical crossconnect apparatus and optical transmission system
HITACHI LTD6 citations73
US6778725B1Aug 17, 2004
Optical switching apparatus, optical transmission system and method of setting up for optical signal route
HITACHI LTD9 citations73
US6714697B2Mar 30, 2004
Optical switching apparatus and optical switching method
HITACHI LTD7 citations73
US6229932B1May 8, 2001
Optical signal switching apparatus
HITACHI LTD12 citations71
US6970614B2Nov 29, 2005
Optical switching equipment, optical transport network, and methods of using them
HITACHI LTD3 citations63
US7848646B2Dec 7, 2010
Optical, network, node apparatus and method for recovery path fault
HITACHI LTD4 citations62
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
US6985649B2Jan 10, 2006
Optical switching apparatus and optical switching method
HITACHI LTD3 citations62
US7542672B2Jun 2, 2009
Optical switching apparatus with optical reflection monitor and reflection monitoring system
HITACHI LTD4 citations54
US7272314B2Sep 18, 2007
Optical crossconnect apparatus and optical transmission system
HITACHI LTD0 citations52
US6334009B1Dec 25, 2001
Optical signal switching apparatus
HITACHI LTD0 citations49
HITACHI COMM TECH LTD
6 patentsUS7526200B2Apr 28, 2009
Wavelength-division multiplexing optical transmitter
HITACHI COMM TECH LTD21 citations92
US7447398B2Nov 4, 2008
Optical crossconnect apparatus
HITACHI COMM TECH LTD6 citations62
US7435013B2Oct 14, 2008
Variable dispersion compensation equipment, optical transmission system using it and method of setting dispersion compensation quantity
HITACHI COMM TECH LTD2 citations62
US7447430B2Nov 4, 2008
Optical cross connect apparatus and optical transmission system
HITACHI COMM TECH LTD6 citations61
US7218818B2May 15, 2007
Dispersion compensation device and dispersion compensation method
HITACHI COMM TECH LTD1 citations51
US7415177B2Aug 19, 2008
Dispersion compensation device and dispersion compensation method
HITACHI COMM TECH LTD0 citations41