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发明名称
Comparison device
摘要
申请公布号
US2944349(A)
申请公布日期
1960.07.12
申请号
US19580762405
申请日期
1958.09.22
申请人
KAUFMAN ADVERTISING CO., INC.
发明人
KAUFMAN HAROLD G.
分类号
B42F17/30;G06K21/02
主分类号
B42F17/30
代理机构
代理人
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地址
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