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发明名称
ZUSATZGERAET FUER FERNSPRECHAPPARATE ZUR ERMOEGLICHUNG EINES VERSTAERKTEN FERNSPRECHHOEREREMPFANGS.
摘要
申请公布号
DE1650113(U)
申请公布日期
1953.02.05
申请号
DE195200L5731U
申请日期
1952.07.14
申请人
LICENTIA PATENT-VERWALTUNGS-G.M.B.H.
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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