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发明名称
Alarm device
摘要
申请公布号
US1782378(A)
申请公布日期
1930.11.18
申请号
US19270226876
申请日期
1927.10.18
申请人
EMIL BAHR
发明人
BAHR EMIL
分类号
G04B23/00
主分类号
G04B23/00
代理机构
代理人
主权项
地址
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