Inventor
SHIRAI KATSUHIRO
JP15 patents
⚠️ This page may combine multiple inventors who share the name “SHIRAI KATSUHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
7 patentsUS6661947B2Dec 9, 2003
Optical transmitting apparatus and optical repeating apparatus
FUJITSU LTD17 citations91
US5905585AMay 18, 1999
Optical bidirectional transmission system and method having transmission-line-disconnection detecting function
FUJITSU LTD35 citations91
US6169615B1Jan 2, 2001
Wavelength division multiplex optical transmission apparatus
FUJITSU LTD8 citations72
US5760936AJun 2, 1998
Optical line switch device enabling connection of non-doubled optical transmission apparatus with doubled bidirectional optical link
FUJITSU LTD10 citations72
US5861974AJan 19, 1999
Transmission device connected to optical transmission line
FUJITSU LTD3 citations61
US6924927B2Aug 2, 2005
Optical transmitting apparatus and optical repeating apparatus
FUJITSU LTD0 citations51
US9755756B2Sep 5, 2017
Transmission device, transmission system, and transmission method
FUJITSU LTD0 citations49
TOKUYAMA CORP
3 patentsSHIRAI KATSUHIRO
3 patentsUS8965197B2Feb 24, 2015
Method of switching optical transport network and node device
SHIRAI KATSUHIRO2 citations59
US8228788B2Jul 24, 2012
Network connection device and signal processing method in the network connection device
SHIRAI KATSUHIRO0 citations48
US8681785B2Mar 25, 2014
Communication apparatus and path setting control method
SHIRAI KATSUHIRO0 citations37