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发明名称
REFERENCE SIGNAL CIRCUIT IN A RECEIVER FOR DETECTING TWO FREQUENCIES IN A MULTIFREQUENCY TONE SIGNAL
摘要
申请公布号
US4082924(A)
申请公布日期
1978.04.04
申请号
US19760755826
申请日期
1976.12.30
申请人
TELEFONAKTIEBOLAGET L M ERICSSON
发明人
CARLQVIST, BENGT ROLAND;ERIKSSON, ANDERS GUNNAR
分类号
H04Q3/04;H04Q1/46;(IPC1-7):H04M1/50
主分类号
H04Q3/04
代理机构
代理人
主权项
地址
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