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经营范围
发明名称
LOUDSPEAKER RESONATOR
摘要
申请公布号
CA339904(A)
申请公布日期
1934.03.06
申请号
CAD339904
申请日期
申请人
THE WIRED RADIO
发明人
WILLIAM H. GERNS
分类号
主分类号
代理机构
代理人
主权项
地址
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