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经营范围
发明名称
Improvements in or relating to communication systems particularly printing telegraph systems
摘要
申请公布号
GB504156(A)
申请公布日期
1939.04.20
申请号
GB19380011740
申请日期
1938.04.19
申请人
发明人
分类号
H04L12/14
主分类号
H04L12/14
代理机构
代理人
主权项
地址
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