Greenberg spent many years developing the technology while working at the Alfred Mann Foundation, a nonprofit organization that develops biomedical devices
EDIT: For those challenging what I am saying, I was speaking towards his motives, when I responded to this comment …
They exist to make money not help humanity.
I was challenging the notion that he did not care about humanity, and just wanted the money.
Its ok to want to help others AND make money doing it. (Unfortunately) We live in a society where money is needed to exist.