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经营范围
发明名称
Improvements in or relating to telephonic call magnetos
摘要
申请公布号
GB611517(A)
申请公布日期
1948.11.01
申请号
GB19450025425
申请日期
1945.10.01
申请人
CHARLES LAURENT
发明人
分类号
H02K21/24
主分类号
H02K21/24
代理机构
代理人
主权项
地址
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