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发明名称
Time switch
摘要
申请公布号
US1848335(A)
申请公布日期
1932.03.08
申请号
US19290395158
申请日期
1929.09.25
申请人
LOUISVILLE FROG, SWITCH & SIGNAL CO.
发明人
FEREDAY FREDERICK T.
分类号
H01H50/88
主分类号
H01H50/88
代理机构
代理人
主权项
地址
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