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发明名称
Screen
摘要
申请公布号
US1780823(A)
申请公布日期
1930.11.04
申请号
US19300422428
申请日期
1930.01.21
申请人
JOHNSON METAL PRODUCTS CO.
发明人
JOHNSON PAUL GEORGE
分类号
E06B9/52
主分类号
E06B9/52
代理机构
代理人
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