Inventor
SERIKAWA ATSUO
JP6 patents
Patents
6 patentsUS6351469B1Feb 26, 2002
Sound/data sharing communications system
FUJITSU LTD27 citations91
US6028845AFeb 22, 2000
Communication-line-quality measuring system using a conventional signal frame structure
FUJITSU LTD40 citations90
US5960005ASep 28, 1999
Method and device for two-way communication network
FUJITSU LTD12 citations71
US6347092B1Feb 12, 2002
Time division multiple access communication system, signal receiving method in time division multiple access communication system, and center unit for use in time division multiple access communication system
FUJITSU LTD6 citations62
US4748659AMay 31, 1988
Calling signal transmission apparatus
FUJITSU LTD2 citations61
US4631366ADec 23, 1986
Battery feed circuit for subscriber line
FUJITSU LTD6 citations60