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发明名称
Einrichtung zur Aufzeichnung und Wiedergabe mechanischer Schallschrift
摘要
申请公布号
DE806058(C)
申请公布日期
1951.06.11
申请号
DE1949P047421
申请日期
1949.06.30
申请人
SIEMENS & HALSKE A.G.
发明人
THOMANN FRIEDRICH
分类号
H04R9/12
主分类号
H04R9/12
代理机构
代理人
主权项
地址
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