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发明名称
MASKING MEANS FOR SELECTIVE PUNCH CARD DATA TRANSMISSION
摘要
申请公布号
US3457392(A)
申请公布日期
1969.07.22
申请号
USD3457392
申请日期
1965.04.06
申请人
WINFRED O. DICK
发明人
WINFRED O. DICK
分类号
G06K7/00;G06K19/00;(IPC1-7):G06K7/01
主分类号
G06K7/00
代理机构
代理人
主权项
地址
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