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发明名称
Alarm clock contact device
摘要
申请公布号
US2227621(A)
申请公布日期
1941.01.07
申请号
US19390266774
申请日期
1939.04.08
申请人
BAILEY WILLIAM P
发明人
BAILEY WILLIAM P.
分类号
G04C21/22
主分类号
G04C21/22
代理机构
代理人
主权项
地址
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