Method and device for an inner-tube
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United States of America Patent
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Issued Date -
Feb 12, 2009
app pub date -
Aug 7, 2007
filing date -
Aug 7, 2007
priority date (Note) -
Abandoned
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Abstract
An inner-tube divided into many isolated cells of air. Two tubes on inside circumference of said inner-tube, one for inflating air and the other for deflating air. Each cell has two one-way valves, one for filling air and the other for extracting air. The inflating valve could have an observation window or an air pressure gauge attached to it for indicating when there is a puncture in one or more of the cells of air in the inner tube.
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