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发明名称
Verfahren zum Verbessern der akustischen Rückhördämpfung von elektroakustischen Anlagen
摘要
申请公布号
DE4305256(A1)
申请公布日期
1994.08.25
申请号
DE19934305256
申请日期
1993.02.20
申请人
ALCATEL SEL AKTIENGESELLSCHAFT, 70435 STUTTGART, DE
发明人
WALKER, MICHAEL, 7066 BALTMANNSWEILER, DE;HEITKAEMPER, PETER, DIPL.-ING., 6112 GROS-ZIMMERN, DE
分类号
H04M9/08;H04M9/10;(IPC1-7):H04B1/62;H03H21/00;H04B3/20;H04M1/58;H04M1/60
主分类号
H04M9/08
代理机构
代理人
主权项
地址
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