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发明名称
Alarm device
摘要
申请公布号
US2190533(A)
申请公布日期
1940.02.13
申请号
US19390281970
申请日期
1939.06.29
申请人
MACPHERSON BENJAMIN F
发明人
MACPHERSON BENJAMIN F.
分类号
G04B25/04
主分类号
G04B25/04
代理机构
代理人
主权项
地址
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