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发明名称
Kohlekoerner-Mikrophon
摘要
申请公布号
DE844307(C)
申请公布日期
1952.07.17
申请号
DE1950V002863
申请日期
1950.11.19
申请人
VIGREN STEN DANIEL;GUSTAFSSON GUSTAF ERNFRID
发明人
VIGREN STEN DANIEL;GUSTAFSSON GUSTAF ERNFRID
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
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