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发明名称
Alarm control for clocks and photoelectric switches
摘要
申请公布号
US2626662(A)
申请公布日期
1953.01.27
申请号
US19470728892
申请日期
1947.02.15
申请人
COOGAN JOHN E
发明人
COOGAN JOHN E.
分类号
G04C21/20
主分类号
G04C21/20
代理机构
代理人
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