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公开(公告)号：US3550244A
公开(公告)日：1970-12-29
申请号：US3550244D
申请日：1967-07-11
Applicant: STANDARD PRESSED STEEL CO
Inventor： VILLO JOSEPH P , UTZY WILLIAM
CPC classification number: G09F3/00 , B07C5/04 , B44B5/026 , F16B1/0071 , F16B19/004 , Y10T29/49771 , Y10T403/20 , Y10T403/55
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