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发明名称
Advertising display clock
摘要
申请公布号
US2586641(A)
申请公布日期
1952.02.19
申请号
US19480006260
申请日期
1948.02.04
申请人
ROWE MANUFACTURING CO., INC.
发明人
GABRIELSEN CHRISTIAN
分类号
G04B37/12;G04B45/00;G09F23/16
主分类号
G04B37/12
代理机构
代理人
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地址
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