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United States of America Patent
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Oct 29, 2013
Grant Date -
N/A
app pub date -
Mar 10, 2010
filing date -
Mar 13, 2009
priority date (Note) -
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Abstract
A hub is formed with a lower extent having a first diameter, an intermediate extent having a second diameter, and a circular upper extent having a third diameter. A circular disk has an upper surface with indicia, a lower surface with an attachment component, and a hole with a diameter essentially equal to the second diameter for being received by the hub. A pointer has a first free end and a first securement ring having an interior diameter essentially equal to the third diameter and an exterior diameter essentially equal to the second diameter. The first securement ring is in sliding contact with the intermediate extent of the hub.
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