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发明名称
RECEIVER AMPLIFIER SYSTEM IN TELEPHONE,ESPECIALLY FOR PERSONS OF HEARING
摘要
申请公布号
PL267024(A1)
申请公布日期
1988.03.17
申请号
PL19870267024
申请日期
1987.07.24
申请人
发明人
分类号
H03F;H03F3/181;H04B;H04M1/60;H04R27/02;(IPC1-7):H03F/;H04B/
主分类号
H03F
代理机构
代理人
主权项
地址
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