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经营范围
发明名称
Improvements in or relating to telephone installations employing a plurality of exchanges
摘要
申请公布号
GB381818(A)
申请公布日期
1932.10.13
申请号
GB19320004745
申请日期
1932.02.17
申请人
MIX & GENEST AKTIENGESELLSCHAFT
发明人
分类号
H04Q3/62
主分类号
H04Q3/62
代理机构
代理人
主权项
地址
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