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发明名称
Switching device
摘要
申请公布号
US2275554(A)
申请公布日期
1942.03.10
申请号
US19410392213
申请日期
1941.05.07
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
JR. CHARLES E. POLLARD,
分类号
H01H29/18
主分类号
H01H29/18
代理机构
代理人
主权项
地址
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