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公开(公告)号：US2620213A
公开(公告)日：1952-12-02
申请号：US14097650
申请日：1950-01-28
Applicant: H B IVES COMPANY
Inventor： KEELER DWIGHT H
IPC: E05C1/04
CPC classification number: E05C1/04 , Y10T292/1024 , Y10T292/103
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