We invested a lot money into an innovators invention back in 2007, and have not heard from him. The company is still in business. How can we pursue?

You should get on it right away, as you may miss a statute of limitations.  What kind of investment?  Stock, debt? Hybrid?  You have the right to know what is occurring.  Get a lawyer.  We'd meet with you for free to examine your options, we'd out line those options, and then, with no obligatio, you can decide if you want to use us, use someone else, or do it on your own.