Smartphone-based public safety company Ping4 has raised $3.8 million to develop a next generation emergency alert system and market it worldwide. With more than a million from the founders of the company and $1.8 million raised between January and March last year, the new round brings the company up to $7 million in funding, Ping4 CEO Jim Bender told MobiHealthNews. The $3.8 million raise is made...