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发明名称
Multichannel communication system
摘要
申请公布号
US2706251(A)
申请公布日期
1955.04.12
申请号
US19450634339
申请日期
1945.12.11
申请人
RUSSELL CARL M;SYMON KEITH R
发明人
RUSSELL CARL M.;SYMON KEITH R.
分类号
H04J1/06
主分类号
H04J1/06
代理机构
代理人
主权项
地址
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