I am working with several medical tech companies. It is "true" venture funding. The main company has bone implants technology and is a "Billion dollar company"

I am working with several medical tech companies. It is "true" venture funding. The main company has bone implants technology and is a "Billion dollar company" in seven years if everything goes well. Even after four years of R&D revenue is still 18 months away. And that is in the thousands not millions. Full commercial production is about four years away. Here are some the joys: 1. Long lead times 2. Highly regulated 3. Conservative buyers