A breathalyzer or breathalyser (a portmanteau of breath and analyzer/analyser) is a device for estimating blood alcohol content(BAC) from a breath sample. Breathalyzer is the brand name for the instrument developed by inventor Robert Frank Borkenstein. It was registered as a trademark on May 13, 1958, and is active as of 2014 but the word has become a generic trademark. This article is about generic devices for estimating blood alcohol content.
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