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1.发明授权Construction element for use as a pillar, strut, brace or other stiffening member 失效用作支柱，支柱，支架或其他加强构件的结构元件
公开(公告)号：US2765014A
公开(公告)日：1956-10-02
申请号：US45588754
申请日：1954-09-14
Applicant: HANS KLEPPER
Inventor： JOSEF MULLER
CPC classification number: E04H15/20 , A47C4/06 , A47C5/12 , E04H2015/201
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