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http://www.google.ca/patents/US3862635?utm_source=gb-gplus-share
Patent US3862635 - SMOOTH TIPPED ENDOTRACHEAL TUBE
SMOOTH TIPPED ENDOTRACHEAL TUBE
Andrew Harautuneian et al
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Abstract
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Description
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Patent number
: 3862635
Filing date
: 23 Apr 1973
Issue date
: 2 Jan 1975
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