VALVE
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Jun 18, 2009
filing date -
Dec 23, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An esophageal valve has a restriction to allow antegrade passage of swallowed food and controlled retrograde passage of fluid. The restriction comprises an iris having a number of folds.
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