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发明名称
Automatic phonograph stop
摘要
申请公布号
US1824847(A)
申请公布日期
1931.09.29
申请号
US19280270100
申请日期
1928.04.14
申请人
EMIL TRAUB
发明人
TRAUB EMIL
分类号
主分类号
代理机构
代理人
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