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发明名称
Selector for control clocks
摘要
申请公布号
US2131304(A)
申请公布日期
1938.09.27
申请号
US19360117168
申请日期
1936.12.22
申请人
PENN ELECTRIC SWITCH CO.
发明人
SHAW BURTON E.
分类号
G04C23/16
主分类号
G04C23/16
代理机构
代理人
主权项
地址
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