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发明名称
Multiplex telecommunication system
摘要
申请公布号
US2145717(A)
申请公布日期
1939.01.31
申请号
US19360086902
申请日期
1936.06.24
申请人
FINCH WILLIAM G H
发明人
FINCH WILLIAM G. H.
分类号
H04M11/06;H04N1/00;H04N1/06;H04N1/36
主分类号
H04M11/06
代理机构
代理人
主权项
地址
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