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公开(公告)号：US3090613A
公开(公告)日：1963-05-21
申请号：US78971259
申请日：1959-01-28
Applicant: BECHTOLD PAUL E
Inventor： BECHTOLD PAUL E
IPC: E04D13/035 , E05F15/12
CPC classification number: E04D13/0352 , E05F15/619 , E05Y2201/656 , E05Y2201/724 , E05Y2900/152
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