Inventor
HIRAI TOORU
JP11 patents
⚠️ This page may combine multiple inventors who share the name “HIRAI TOORU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
5 patentsUS6987899B2Jan 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
US6714697B2Mar 30, 2004
Optical switching apparatus and optical switching method
HITACHI LTD7 citations73
US7848646B2Dec 7, 2010
Optical, network, node apparatus and method for recovery path fault
HITACHI LTD4 citations62
US6985649B2Jan 10, 2006
Optical switching apparatus and optical switching method
HITACHI LTD3 citations62
HITACHI COMM TECH LTD
4 patentsUS7447398B2Nov 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
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