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公开(公告)号：US2958090A
公开(公告)日：1960-11-01
申请号：US71980558
申请日：1958-03-07
Applicant: EARL SLOPA ROBERT , SLOPA GEORGE W
Inventor： EARL SLOPA ROBERT , SLOPA GEORGE W
CPC classification number: E06B3/80 , E05F1/065 , E05F1/1223 , E05Y2201/638 , Y10T16/5386 , Y10T16/5387
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