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发明名称
Drawing and method of and medium for making the same
摘要
申请公布号
US2224271(A)
申请公布日期
1940.12.10
申请号
US19380237042
申请日期
1938.10.26
申请人
LOUIS S. SANDERS
发明人
ISLER WILLIAM
分类号
G03F1/00
主分类号
G03F1/00
代理机构
代理人
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地址
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