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发明名称
Alarm system
摘要
申请公布号
US1948850(A)
申请公布日期
1934.02.27
申请号
US19330661039
申请日期
1933.03.16
申请人
EHRLE JOHN H
发明人
EHRLE JOHN H.
分类号
G04C21/30
主分类号
G04C21/30
代理机构
代理人
主权项
地址
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