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发明名称
MULTIIFREQUENCY SIGNAL RECEVING SYSTEM
摘要
PURPOSE:To enable reception of PB signal sent from both the PB telephone and the dial-type teleohone with the dame receiver, by demodulating the PB signal shifted from the dial-type telephone.
申请公布号
JPS5394808(A)
申请公布日期
1978.08.19
申请号
JP19770009909
申请日期
1977.01.31
申请人
NIPPON ELECTRIC CO
发明人
HASEGAWA KOUICHI
分类号
H04M11/00;H04L27/26;H04M11/06;H04Q1/45
主分类号
H04M11/00
代理机构
代理人
主权项
地址
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