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经营范围
发明名称
Curved escalator with vertical planar step risers and constant horizontal velocity
摘要
申请公布号
US4949832(A)
申请公布日期
1990.08.21
申请号
US19890422265
申请日期
1989.10.16
申请人
OTIS ELEVATOR COMPANY
发明人
SANSEVERO, FRANK M.
分类号
B66B23/02;B66B21/06;B66B23/12
主分类号
B66B23/02
代理机构
代理人
主权项
地址
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