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经营范围
发明名称
Electrical resistance
摘要
申请公布号
US1963755(A)
申请公布日期
1934.06.19
申请号
US19310581084
申请日期
1931.12.15
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MEAD EDWARD D.
分类号
H01C1/14
主分类号
H01C1/14
代理机构
代理人
主权项
地址
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