Euler disc
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United States of America Patent
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Sep 11, 2018
Grant Date -
Dec 31, 2015
app pub date -
Jun 27, 2014
filing date -
Jun 27, 2014
priority date (Note) -
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Abstract
An Euler disc comprises a metal disc body having a maximum radius, an upper surface, a lower surface, a circular polished rounded edge joining the upper surface and the lower surface, and a maximum thickness. The upper surface is formed so that the cross-sectional area of the disc body that is above a horizontal bisector line and outside of a vertical quarter line drawn at one half of the maximum radius is less than 75% of the cross-sectional area of the disc body that is below the horizontal bisector line and outside of the vertical quarter line.
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