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经营范围
发明名称
An automatic electric time switch
摘要
申请公布号
GB410346(A)
申请公布日期
1934.05.17
申请号
GB19330019720
申请日期
1933.07.12
申请人
GEORGE BENJAMIN STERN
发明人
分类号
G04C23/16
主分类号
G04C23/16
代理机构
代理人
主权项
地址
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