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发明名称
Automatic advertising display device
摘要
申请公布号
US1964856(A)
申请公布日期
1934.07.03
申请号
US19330661984
申请日期
1933.03.21
申请人
MURRAY CHARLES L
发明人
MURRAY CHARLES L.
分类号
G09F13/34
主分类号
G09F13/34
代理机构
代理人
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