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发明名称
Photographic masking
摘要
申请公布号
US2170883(A)
申请公布日期
1939.08.29
申请号
US19380194521
申请日期
1938.03.07
申请人
MIEHLE PRINTING PRESS AND MANUFACTURING COMPANY
发明人
WILKINSON WILLIAM J.
分类号
G03F3/06
主分类号
G03F3/06
代理机构
代理人
主权项
地址
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