Book with rotating device
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United States of America Patent
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-
Apr 8, 2008
Grant Date -
Apr 27, 2006
app pub date -
Oct 22, 2004
filing date -
Oct 22, 2004
priority date (Note) -
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Abstract
A book with at least one rotating device that allows the user to answer various questions and check whether his responses are correct that also may be used as an entertaining or easy to use reference source.
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