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发明名称
PROTECTIVE DEVICE AGAINST THE LARSEN EFFECT IN A LOUDSPEAKING TELEPHONE APPARATUS
摘要
申请公布号
EP0039109(B1)
申请公布日期
1984.09.05
申请号
EP19810200417
申请日期
1981.04.13
申请人
TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T.R.T.
发明人
FERRIEU, GILBERT MARIE MARCEL;LEFORT, EMMANUEL;MOLIERE, FRANCOISE;HAMEL, ROGER
分类号
H04M9/08;H04M1/60;(IPC1-7):04M9/08
主分类号
H04M9/08
代理机构
代理人
主权项
地址
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