发明名称 Trailer level
摘要 A trailer tongue arrangement is provided having a power jack. The power jack is removably engaged with the tongue and includes a circular level unit thereon which indicates a level condition in the front-to-back and side-to-side directions.
申请公布号 US6840541(B2) 申请公布日期 2005.01.11
申请号 US20020330942 申请日期 2002.12.27
申请人 BARKER MANUFACTURING CO. 发明人 WALTERS DUANE
分类号 B60D1/66;B60S9/08;(IPC1-7):B60S9/08 主分类号 B60D1/66
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