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经营范围
发明名称
Hectograph mass containing color intensifiers
摘要
申请公布号
US2216590(A)
申请公布日期
1940.10.01
申请号
US19390250970
申请日期
1939.01.14
申请人
DITTO, INCORPORATED
发明人
JR. WILLIAM HOSKINS,
分类号
B41M5/06
主分类号
B41M5/06
代理机构
代理人
主权项
地址
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