发明名称 Credit card-shaped tire tread gauge
摘要 A tire tread gauge shaped like a rectangular card that fits easily into a credit card slot in a wallet or purse. The card has a tread measurement scale imprinted, engraved, molded or otherwise marked onto one or both sides and is used to measure the remaining tread depth on motor vehicle tires. Other possible embodiments include a card with more or less than 4 sides or a round card.
申请公布号 US7484302(B2) 申请公布日期 2009.02.03
申请号 US20060333395 申请日期 2006.01.17
申请人 JAMES ROBERT MCCAIG 发明人 JAMES ROBERT MCCAIG
分类号 G01B5/18 主分类号 G01B5/18
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