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发明名称
Improvements in or relating to electrical signal transmission systems
摘要
申请公布号
GB390811(A)
申请公布日期
1933.04.10
申请号
GB19310027943
申请日期
1931.10.08
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H04L25/04;H04L25/42
主分类号
H04L25/04
代理机构
代理人
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地址
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