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| iCOquit® Smokerlyzer® (K211918) | Bedfont Scientific, Ltd. | 2021-12-21 |
| Pivot Breath Sensor (K201206) | Carrot, Inc. | 2021-06-30 |
| ToxCO (K173238) | Bedfont Scientific, Ltd. | 2019-04-04 |
| CO Check Pro, CO Screen (K171129) | MD Diagnostics Limited | 2018-03-02 |
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| COSENSE CO MONITOR (K130036) | Capnia, Inc. | 2014-01-14 |
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| TABATABA COTESTER (K080278) | Fim Medical | 2008-11-28 |
| EC50 TOXCO+ BREATH CARBON MONOXIDE MONITOR (K070259) | Bedfont Scientific, Ltd. | 2008-02-21 |
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| BEDFONT EC50 SMOKERLYZER CARBON MONOXIDE MONITOR (K892841) | Bedfont Technical Instruments , Ltd. | 1989-10-05 |
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| VITALOGRAPH EC-50 CARBON MONOXIDE MONITOR (K863420) | Vitalograph , Ltd. | 1987-01-15 |
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