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发明名称
Rhythmic telegraph system
摘要
申请公布号
US2903514(A)
申请公布日期
1959.09.08
申请号
US19540476441
申请日期
1954.12.20
申请人
STAATSBEDRIJF DER POSTERIJIN
发明人
DUUREN HENDRIK CORNELIS ANTHONY VAN
分类号
H04L1/00
主分类号
H04L1/00
代理机构
代理人
主权项
地址
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