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公开(公告)号：US2948402A
公开(公告)日：1960-08-09
申请号：US75683558
申请日：1958-08-25
Applicant: PATTERSON JARED W
Inventor： PATTERSON JARED W
IPC: B42F15/00
CPC classification number: B42F15/0035 , B42F15/0005 , B42F15/0094
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