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发明名称
High or low voltage indicating system
摘要
申请公布号
US2197868(A)
申请公布日期
1940.04.23
申请号
US19370173156
申请日期
1937.11.06
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KNOWLTON CLARENCE S.
分类号
H02H3/20
主分类号
H02H3/20
代理机构
代理人
主权项
地址
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