US Patent 9241054 Protective case with integrated breathalyzer

An apparatus includes a protective case for a portable computing device and an integrated alcohol sensor module for measuring the blood alcohol concentration of a user. The apparatus also includes a breath interface, a wireless communication device, an alcohol sensor module and a microcontroller. The protective case houses and protects the portable computing device and the internal electronic components. The breath interface allows the user to provide a breath sample to the alcohol sensor module. The alcohol sensor module measures the alcohol concentration of the breath sample. The microcontroller operates the alcohol sensor module and conveys the alcohol concentration measurements to the portable computing device via the wireless communication device. The microcontroller and the wireless communication device are both mounted within the protective case. The alcohol concentration measurement is used as input for a variety of software application which promote safe drinking and driving habits.