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经营范围
发明名称
DATA TRANSMISSION SYSTEM
摘要
申请公布号
GB1572670(A)
申请公布日期
1980.07.30
申请号
GB19770022585
申请日期
1977.05.27
申请人
IBM CORP
发明人
分类号
H04L27/38;H04L27/00;H04L27/18;H04L27/20;(IPC1-7):H04L27/00
主分类号
H04L27/38
代理机构
代理人
主权项
地址
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