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经营范围
发明名称
Improvements in or relating to electrical communication systems
摘要
申请公布号
GB745148(A)
申请公布日期
1956.02.22
申请号
GB19530006248
申请日期
1953.03.06
申请人
ABRAHAM GILMOOR
发明人
分类号
H04M1/26;H04Q9/00
主分类号
H04M1/26
代理机构
代理人
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