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公开(公告)号：US2846238A
公开(公告)日：1958-08-05
申请号：US65640357
申请日：1957-05-01
Applicant: GEN LOOSE LEAF BINDERY CO INC
Inventor： LOUIS NICKOW , NICKOW MARTIN A , HY NICKOW
IPC: B42F13/00
CPC classification number: B42F13/006
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