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发明名称
Electrodynamic device
摘要
申请公布号
US1990858(A)
申请公布日期
1935.02.12
申请号
US19310570998
申请日期
1931.10.26
申请人
RADIO CORPORATION
发明人
DIJKSTERHUIS POPKO REINDER
分类号
H04R7/12;H04R9/04
主分类号
H04R7/12
代理机构
代理人
主权项
地址
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