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发明名称
METHODS OF PHOTOGRAPHING AND REPRODUCING DOCUMENTS AND THE LIKE
摘要
申请公布号
CA479807(A)
申请公布日期
1952.01.01
申请号
CAD479807
申请日期
申请人
VERNEUR E. PRATT;GEORGE F. GRAY
发明人
GEORGE F. GRAY;VERNEUR E. PRATT
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主分类号
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