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经营范围
发明名称
Emergency means of egress from elevator cars
摘要
申请公布号
US1977706(A)
申请公布日期
1934.10.23
申请号
US19310515822
申请日期
1931.02.14
申请人
MCN WATTS MALCOLM S
发明人
WATTS MALCOLM S. MCN.
分类号
B66B5/02
主分类号
B66B5/02
代理机构
代理人
主权项
地址
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