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发明名称
Automatic light control device
摘要
申请公布号
US1974265(A)
申请公布日期
1934.09.18
申请号
US19310570082
申请日期
1931.10.21
申请人
GEORGE ELFLEIN
发明人
ELFLEIN GEORGE
分类号
G04C23/16
主分类号
G04C23/16
代理机构
代理人
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