Incentive spirometer with automatic levelling
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United States of America Patent
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Jan 17, 1984
Grant Date -
N/A
app pub date -
Nov 23, 1981
filing date -
Nov 23, 1981
priority date (Note) -
Expired
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Abstract
An incentive spirometer, of the type wherein an object is raised in a tube by a patient inhaling through the tube, is improved by automatically maintaining the tube vertically-oriented in spite of tilting of the frame from which the tube is supported.
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