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发明名称
Film holder
摘要
申请公布号
US2401541(A)
申请公布日期
1946.06.04
申请号
US19440567948
申请日期
1944.12.13
申请人
BERNE FRANK R
发明人
BERNE FRANK R.
分类号
G03D13/12
主分类号
G03D13/12
代理机构
代理人
主权项
地址
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