发明名称 Curved stairway and method
摘要 A curved stairway is illustrated wherein the usual wooden components, including the stringers A, are provided with steel reinforcement, including metallic stringers B provided with cross bracing D and E in order to provide a composite structure affording rigidity with minimal reinforcement.
申请公布号 US5058339(A) 申请公布日期 1991.10.22
申请号 US19900595989 申请日期 1990.10.11
申请人 KRSTOVIC, ALEXANDER P. 发明人 KRSTOVIC, ALEXANDER P.
分类号 E04F11/025;E04F11/108 主分类号 E04F11/025
代理机构 代理人
主权项
地址