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发明名称
Resistance device
摘要
申请公布号
US1859344(A)
申请公布日期
1932.05.24
申请号
US19300486698
申请日期
1930.10.06
申请人
RUBEN PATENTS COMPANY
发明人
RUBEN SAMUEL
分类号
H01C10/00
主分类号
H01C10/00
代理机构
代理人
主权项
地址
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