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经营范围
发明名称
Improvements in or relating in intercommunication telephone systems
摘要
申请公布号
GB685197(A)
申请公布日期
1952.12.31
申请号
GB19510023748
申请日期
1951.10.11
申请人
ADOLF ERWIN ADLER;MODERN TELEPHONES (GREAT BRITAIN) LIMITED
发明人
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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