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公开(公告)号：US3403474A
公开(公告)日：1968-10-01
申请号：US56438066
申请日：1966-07-11
Applicant: JOHN SPASOFF
Inventor： JOHN SPASOFF
IPC: E05F15/14
CPC classification number: E05F15/41 , E05F15/643 , E05Y2201/668 , E05Y2201/672 , E05Y2600/322 , E05Y2800/21 , Y10T74/18848
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