发明名称 Concrete step shelter
摘要 An economical step shelter is disclosed for use with mobile homes, modular homes, or other homes not incorporating basements. The step shelter is manufactured by modifying the existing molds for making steps and adding an opening large enough for a human being to enter and exit and a means for closing said opening, typically a steel door. The step shelter is economical and efficient and practical for use with existing or new homes.
申请公布号 US6374553(B1) 申请公布日期 2002.04.23
申请号 US19990244308 申请日期 1999.02.04
申请人 JOHNSON RICHARD VAIL 发明人 JOHNSON RICHARD VAIL
分类号 E04F11/00;E04H9/14;(IPC1-7):E04B1/98;E04H9/02 主分类号 E04F11/00
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