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发明名称
Mask
摘要
申请公布号
US2414405(A)
申请公布日期
1947.01.14
申请号
US19440568372
申请日期
1944.12.15
申请人
BIERMAN HOWARD R;BECKWITH GEORGE E
发明人
BIERMAN HOWARD R.;BECKWITH GEORGE E.
分类号
A62B18/08
主分类号
A62B18/08
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