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发明名称
Time alarm-switch-operating mechanism
摘要
申请公布号
US1801699(A)
申请公布日期
1931.04.21
申请号
US19300458651
申请日期
1930.05.31
申请人
TRAGER MARTIN E
发明人
TRAGER MARTIN E.
分类号
G04F3/06
主分类号
G04F3/06
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代理人
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