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经营范围
发明名称
Improvements in or relating to automatic telephone stations
摘要
申请公布号
GB392079(A)
申请公布日期
1933.05.11
申请号
GB19320030318
申请日期
1932.10.28
申请人
TELEPHON-APPARAT-FABRIK E. ZWIETUSCH & CO., G.M.B.H.
发明人
分类号
H04M17/02
主分类号
H04M17/02
代理机构
代理人
主权项
地址
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