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发明名称
Variable resistance device
摘要
申请公布号
US2401037(A)
申请公布日期
1946.05.28
申请号
US19420465322
申请日期
1942.11.12
申请人
P. R. MALLORY & CO., INC.
发明人
ARVIN MARION J.
分类号
H01C10/20
主分类号
H01C10/20
代理机构
代理人
主权项
地址
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