Method and Apparatus for Determining and Retrieving Positional Information
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United States of America Patent
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Jan 22, 2015
app pub date -
Oct 10, 2014
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Feb 10, 2004
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Abstract
An apparatus for determining and retrieving positional information including a surface having a plurality of first elements and a plurality of second elements, a first detection element connected to at least one of the plurality of first elements, and a second detection element connected to at least one of the plurality of second elements. The detection elements may include light detection elements or impact sensing circuits.
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