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发明名称
Whistle
摘要
申请公布号
US1856625(A)
申请公布日期
1932.05.03
申请号
US19310562367
申请日期
1931.09.11
申请人
SAMUEL DRESSLER
发明人
DRESSLER SAMUEL
分类号
G10D7/02
主分类号
G10D7/02
代理机构
代理人
主权项
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