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公开(公告)号：US2105195A
公开(公告)日：1938-01-11
申请号：US14138637
申请日：1937-05-08
Applicant: DITTO INC
Inventor： ALFRED MARCHEV , LEACH VERLIN M
IPC: B65H1/04
CPC classification number: B65H1/02 , B65H2405/3312
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