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发明名称
Folding screen
摘要
申请公布号
US2055862(A)
申请公布日期
1936.09.29
申请号
US19340757498
申请日期
1934.12.14
申请人
FRIEDMAN JOSEPH B
发明人
FRIEDMAN JOSEPH B.
分类号
G03B21/58
主分类号
G03B21/58
代理机构
代理人
主权项
地址
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