Inventor
AYANO MITSUTOSHI
JP6 patents
Patents
6 patentsUS4827505AMay 2, 1989
Subscriber line interface circuit
FUJITSU LTD26 citations91
US4677669AJun 30, 1987
Battery feed circuit for a pair of subscriber lines
FUJITSU LTD13 citations70
US4748659AMay 31, 1988
Calling signal transmission apparatus
FUJITSU LTD2 citations61
US4631366ADec 23, 1986
Battery feed circuit for subscriber line
FUJITSU LTD6 citations60
US4588860AMay 13, 1986
Battery feed circuit for telephone subscriber line
FUJITSU LTD5 citations57
US4175218ANov 20, 1979
Telephone switching system
FUJITSU LTD2 citations57