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公开(公告)号：US2240041A
公开(公告)日：1941-04-29
申请号：US26773639
申请日：1939-04-13
Applicant: DITTO INC
Inventor： HOSKINS JR VILLIAM , BOUR ROBERT C
IPC: B41M5/08
CPC classification number: B41M5/08 , Y10S428/914 , Y10T442/2484
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