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发明名称
Sequence switch apparatus
摘要
申请公布号
US2561686(A)
申请公布日期
1951.07.24
申请号
US19450616793
申请日期
1945.09.17
申请人
CALHOUN WENDELL W
发明人
CALHOUN WENDELL W.
分类号
G04C23/00
主分类号
G04C23/00
代理机构
代理人
主权项
地址
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