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发明名称
Printing directory
摘要
申请公布号
US2950672(A)
申请公布日期
1960.08.30
申请号
US19570702042
申请日期
1957.12.11
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
HAGOPIAN JACOB J.
分类号
B41K3/10
主分类号
B41K3/10
代理机构
代理人
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