I suggest you get your hands on a copy of the book
Code Named Ginger by Steve Kemper. It is the official book of the Segway, and has a lot of info on inventing, and all the processes and headaches you have to go through to get something ready to market. I just finished reading it, and it was awesome.
And, it stars everybody's favorite 20th/21st century inventor and FIRST founder, Dean Kamen.
