US Patent 6939494 Method of making ventilation tube
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Patent abstract
A medical ventilation tube for placement in an opening formed in an anatomical structure, such as the tympanic membrane of the ear, includes a hollow tubular shaft made of a first material having a hardness or durometer to maintain a passage through the shaft when the medical ventilation tube is placed in the opening, and a flange made of a second material having a hardness or durometer less than that of the first material to permit the flange to deform in response to contact with the anatomical structure during removal of the medical ventilation tube from the opening.
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Patent Inventor Names
F. Barry Bays0
Richard L. Goode0
Date of Patent
September 6, 2005
0Patent Application Number
100287750
Date Filed
December 28, 2001
0Patent Primary Examiner
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US Patent 6939494 Method of making ventilation tube
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