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公开(公告)号：US2975537A
公开(公告)日：1961-03-21
申请号：US74691658
申请日：1958-07-07
Applicant: ACME VISIBLE RECORDS INC
Inventor： REID DONALD L , ASTON LOYD SAMUEL
IPC: B42F21/10
CPC classification number: B42F21/10
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