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US4 patents
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US8312758B2Nov 20, 2012
Apparatus and method for using the speed of sound in photoacoustic gas sensor measurements
TOBIAS PETER12 citations83
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End of service life indicator for respirator
TOBIAS PETER9 citations82
US8616205B2Dec 31, 2013
Respirator with end-of-service-life detection
TOBIAS PETER7 citations81
US9079049B2Jul 14, 2015
Respirators with a sacrificial cartridge for end of service life indication
TOBIAS PETER15 citations76