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发明名称
Signal wave transmission system
摘要
申请公布号
US2248746(A)
申请公布日期
1941.07.08
申请号
US19400325341
申请日期
1940.03.22
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
DAVIS KINGSBURY H.
分类号
H04B3/20
主分类号
H04B3/20
代理机构
代理人
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地址
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