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经营范围
发明名称
Variable electrical resistor
摘要
申请公布号
US2833901(A)
申请公布日期
1958.05.06
申请号
US19550553334
申请日期
1955.12.15
申请人
DAVID KATZ
发明人
KATZ DAVID
分类号
H01C10/04
主分类号
H01C10/04
代理机构
代理人
主权项
地址
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