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发明名称
Alarm-clock attachment for electrical connecters
摘要
申请公布号
US1794820(A)
申请公布日期
1931.03.03
申请号
US19290372705
申请日期
1929.06.21
申请人
P. H. LONG
发明人
ALVES ALFRED CHARLES
分类号
G04C21/24
主分类号
G04C21/24
代理机构
代理人
主权项
地址
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