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发明名称
Split-switch structure
摘要
申请公布号
US1818885(A)
申请公布日期
1931.08.11
申请号
US19300458625
申请日期
1930.05.31
申请人
PETTIBONE MULLIKEN COMPANY
发明人
ENSTROM AUGUST
分类号
E01B7/02
主分类号
E01B7/02
代理机构
代理人
主权项
地址
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