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公开(公告)号:US2664609A
公开(公告)日:1954-01-05
申请号:US6611648
申请日:1948-12-18
申请人: KELLEMS COMPANY
发明人: KELLEMS EDGAR E
IPC分类号: A47G7/04 , A47L13/512 , B21F27/12 , B25G3/00
CPC分类号: B21F27/121 , A47G7/041 , A47L13/512 , B25G3/00 , Y10T29/49833 , Y10T29/49911 , Y10T29/4994 , Y10T403/39