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经营范围
发明名称
Sounding condenser
摘要
申请公布号
US1881107(A)
申请公布日期
1932.10.04
申请号
US19280306158
申请日期
1928.09.15
申请人
HANS VOGT
发明人
VOGT HANS
分类号
H04R19/00
主分类号
H04R19/00
代理机构
代理人
主权项
地址
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