Inventor
IKEUCHI MICHIO
JP6 patents
Patents
6 patentsUS5428680AJun 27, 1995
DTMF signal receiving apparatus equipped with a DTMF signal judging circuit
SHARP KK34 citations91
US5592544AJan 7, 1997
DTMF signal judging apparatus
SHARP KK12 citations73
US5588052ADec 24, 1996
DTMF signal judging apparatus
SHARP KK8 citations73
US5068876ANov 26, 1991
Phase shift angle detector
SHARP KK11 citations72
US5343420AAug 30, 1994
Signal discrimination circuit
SHARP KK17 citations71
US5757513AMay 26, 1998
Signal discrimination circuit
SHARP KK3 citations60