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经营范围
发明名称
Time alarm
摘要
申请公布号
US1955558(A)
申请公布日期
1934.04.17
申请号
US19300470000
申请日期
1930.07.23
申请人
RADIO CORPORATION
发明人
NELSON HENRY J.;FRANKLIN BERNARD S.
分类号
G04C21/32
主分类号
G04C21/32
代理机构
代理人
主权项
地址
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