Device for testing one's breath
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United States of America Patent
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-
May 8, 1990
Grant Date -
N/A
app pub date -
Nov 17, 1986
filing date -
Nov 17, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of testing one's breath involving exhaling through the mouth into a face mask adapted to retain a substantial quantity of exhaled gases, and while retaining the mask in place, breathing in the exhaled gases through the nostrils.
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