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公开(公告)号：US1791475A
公开(公告)日：1931-02-03
申请号：US30188828
申请日：1928-08-24
Applicant: WIGGINTON COMPANY
Inventor： CORELL LEON O
IPC: E05F15/12
CPC classification number: E05F15/619 , E05Y2201/722 , E05Y2900/132 , Y10T74/18776
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