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发明名称
Schaltungseinrichtung in Fernsprechanlagen mit an Teilnehmerleitungen angeschlossenen elektroakustischen Wandlern.
摘要
申请公布号
CH250535(A)
申请公布日期
1947.08.31
申请号
CHD250535
申请日期
1946.02.25
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
ERICSSON TELEFONAKTIEBOLAGET L. M.
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
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