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发明名称
Film holder
摘要
申请公布号
US2572735(A)
申请公布日期
1951.10.23
申请号
US19460646333
申请日期
1946.02.08
申请人
NATIONAL ORGAN SUPPLY COMPANY
发明人
KUGEL HARRY H.
分类号
G03B21/64
主分类号
G03B21/64
代理机构
代理人
主权项
地址
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