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经营范围
发明名称
Improvements in or relating to telephone systems
摘要
申请公布号
GB360997(A)
申请公布日期
1931.11.19
申请号
GB19300024844
申请日期
1930.08.19
申请人
AUTOMATIC TELEPHONE MANUFACTURING COMPANY LIMITED;CHARLES GILLINGS;FRANCIS TATLOCK BELAS
发明人
分类号
H04M15/10
主分类号
H04M15/10
代理机构
代理人
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地址
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