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经营范围
发明名称
Electrophonic filter
摘要
申请公布号
US1990044(A)
申请公布日期
1935.02.05
申请号
US19310575911
申请日期
1931.11.18
申请人
GEORGES MABBOUX
发明人
MABBOUX GEORGES
分类号
G10H1/12
主分类号
G10H1/12
代理机构
代理人
主权项
地址
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