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公开(公告)号：US3050770A
公开(公告)日：1962-08-28
申请号：US2234460
申请日：1960-04-14
Applicant: H B IVES COMPANY
Inventor： MORSE JOHN B , BENSON FRITZ C
IPC: E05F5/06
CPC classification number: E05F5/06 , Y10T16/6285
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