Marker for a navigation system
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United States of America Patent
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Sep 17, 2013
Grant Date -
Nov 24, 2011
app pub date -
May 5, 2009
filing date -
May 6, 2008
priority date (Note) -
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Abstract
A marker for a navigation system for determining the spatial position (e.g., of a surgical instrument), said marker including a retroreflective ball (12). A retroreflective surface (13) of the ball (12) is protected by a dimensionally stable, translucent or transparent shell (14) in such a way that the reflected image remains essentially uninfluenced in terms of contour and the position of the centre of gravity.
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