Hat.
    4.
    发明授权
    Hat. 失效

    公开(公告)号:US995990A

    公开(公告)日:1911-06-20

    申请号:US1910595034

    申请日:1910-12-01

    Applicant: STERN DAVID

    Inventor: STERN DAVID

    CPC classification number: A42B1/248

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