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发明名称
Alarm signal
摘要
申请公布号
US1810162(A)
申请公布日期
1931.06.16
申请号
US19300425606
申请日期
1930.02.03
申请人
DAVIS MICHAEL J
发明人
DAVIS MICHAEL J.
分类号
G10K5/00
主分类号
G10K5/00
代理机构
代理人
主权项
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