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公开(公告)号：US2723821A
公开(公告)日：1955-11-15
申请号：US27171652
申请日：1952-02-15
Applicant: TECHNICOLOR MOTION PICTURE
Inventor： KELLY DONALD H , THAYER EUGENE M
IPC: G02B27/14
CPC classification number: G02B27/1013 , G02B27/1073 , G02B27/149
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