Versioning system for electronic textbooks
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United States of America Patent
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Aug 14, 2012
Grant Date -
Jul 22, 2010
app pub date -
Jan 9, 2009
filing date -
Jan 9, 2008
priority date (Note) -
Expired
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Abstract
A versioning system for electronic textbooks provided to a variety of textbook readers uses a highly abstracted content file tagged with content identifiers allowing this content file to be readily re-edited into multiple versions compatible with different curricula and suitable for a range of different reader types.
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