Paper sheet having a hinge adjacent to its spine edge, a plurality of the sheets being bound into a book whereby the sheets lay flat when the book opened
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United States of America Patent
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Issued Date -
Jun 26, 2014
app pub date -
Dec 26, 2012
filing date -
Dec 26, 2012
priority date (Note) -
Abandoned
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Abstract
A method for binding a plurality of paper sheets to form a book, grooves being formed in both surfaces of each sheet adjacent the sheet spine. The sheets lay flat when the book is opened.
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