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发明名称
Narrow-band telephony system
摘要
申请公布号
US2998491(A)
申请公布日期
1961.08.29
申请号
US19550490374
申请日期
1955.02.24
申请人
MARCON PIERRE C;DAGUET JACQUES L
发明人
MARCON PIERRE C.;DAGUET JACQUES L.
分类号
H04B1/68
主分类号
H04B1/68
代理机构
代理人
主权项
地址
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