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发明名称
Type intaglio engraving plates and method for their production
摘要
申请公布号
US2112416(A)
申请公布日期
1938.03.29
申请号
US19370126229
申请日期
1937.02.17
申请人
RALPH DEWBERRY
发明人
DEWBERRY RALPH
分类号
B41M7/02;G03F1/92;G03F5/20;G03F7/20
主分类号
B41M7/02
代理机构
代理人
主权项
地址
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