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发明名称
Mute
摘要
申请公布号
US1775089(A)
申请公布日期
1930.09.09
申请号
US19290367761
申请日期
1929.06.01
申请人
DE COSTA ANTONE
发明人
COSTA ANTONE DE
分类号
G10D3/04
主分类号
G10D3/04
代理机构
代理人
主权项
地址
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