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发明名称
Switching circuit
摘要
申请公布号
US2226952(A)
申请公布日期
1940.12.31
申请号
US19390309029
申请日期
1939.12.13
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
SMETHURST JOSEPH O.
分类号
H01H47/36;H04B3/20
主分类号
H01H47/36
代理机构
代理人
主权项
地址
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