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发明名称
ULTRASONIC OBJECT-SUPPORTING SYSTEM IN A SKI-SLOPE OR THE LIKE
摘要
申请公布号
US3628789(A)
申请公布日期
1971.12.21
申请号
USD3628789
申请日期
1969.03.05
申请人
ULTRASONIC SYSTEMS INC.
发明人
LEONARD W. SUROFF
分类号
A63C19/10;(IPC1-7):A63G21/14
主分类号
A63C19/10
代理机构
代理人
主权项
地址
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