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发明名称
Visible data system
摘要
申请公布号
US2226976(A)
申请公布日期
1940.12.31
申请号
US19380247293
申请日期
1938.12.22
申请人
ALBERT E. CALL
发明人
LEAMING SILAS T.
分类号
B42F17/00;B42F17/08
主分类号
B42F17/00
代理机构
代理人
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地址
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