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发明名称
Multiple film hanger with film tensioning means
摘要
申请公布号
US2497429(A)
申请公布日期
1950.02.14
申请号
US19450616596
申请日期
1945.09.15
申请人
PAKO CORPORATION
发明人
ARMSTRONG ROBERT W.;SARDESON ROBERT;SAVELA EDWARD H.
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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