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发明名称
Elektromagnetisches Schwingungssystem, insbesondere fuer Lautsprecher
摘要
申请公布号
DE649226(C)
申请公布日期
1937.08.18
申请号
DED649226D
申请日期
1930.03.04
申请人
FIRMA PETER GRASSMANN
发明人
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
主权项
地址
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