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发明名称
Electronic combination switch
摘要
申请公布号
US2541461(A)
申请公布日期
1951.02.13
申请号
US19490084979
申请日期
1949.04.01
申请人
ALBERT CHURCHILL
发明人
CHURCHILL ALBERT
分类号
G07C9/00
主分类号
G07C9/00
代理机构
代理人
主权项
地址
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