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发明名称
APPARATUS FOR PRODUCING FILTER ELEMENT
摘要
申请公布号
US3453957(A)
申请公布日期
1969.07.08
申请号
USD3453957
申请日期
1966.10.31
申请人
MCDONNELL DOUGLAS CORP.
发明人
VERN E. HAMILTON
分类号
B41F1/26;B41F3/20;(IPC1-7):B41F3/20;B41L13/00
主分类号
B41F1/26
代理机构
代理人
主权项
地址
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