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Charles Michael Yim is a serial entrepreneur and chief executive officer of Breathometer, a device that measures blood alcohol content of users utilizing iOS and Android smartphones. Yim founded Breathometer in September 2012. He previously founded three other startup companies, including Chatterfly. He served as founding chief executive officer of Chatterfly, a mobile loyalty platform for businesses, until it was acquired by Plum District in December 2011. He began his career in software and business development at Fortify Software. Yim originally asked for $250,000 for a 10% stake in Breathometer, but all five “sharks” ended up investing a total of $1 million for a collective 30% stake in the company.
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