发明名称 Maximum Security/Maximum Versatility Ball Mount Assembly
摘要 A vehicle ball mount assembly includes a shank, an upper platform attached to the shank, and a lower platform attached to the shank and spaced from the upper platform. The lower platform extends beyond the upper platform. A first tow ball extends from the upper platform and a second tow ball extends from the lower platform.
申请公布号 US2010084449(A1) 申请公布日期 2010.04.08
申请号 US20090570121 申请日期 2009.09.30
申请人 COLUMBIA JOHN R 发明人 COLUMBIA JOHN R.
分类号 B60R9/06 主分类号 B60R9/06
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