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发明名称
Two-way communication system
摘要
申请公布号
US2521721(A)
申请公布日期
1950.09.12
申请号
US19460716048
申请日期
1946.12.13
申请人
FEDERAL TELEPHONE AND RADIO CORPORATION
发明人
HOFFMAN ROSS B.;FERRAR ROBERT C.
分类号
H04B1/46;H04B1/54;H04J3/00
主分类号
H04B1/46
代理机构
代理人
主权项
地址
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