[Seabear]

Angel Investors usually come in to a start-up company prior to the Venture guys. Most companies that get funded by angels show some traction gaining customers/market. Getting funded for a patent idea can be difficult but there are a number of angel groups in every big metro area. The Anger Capital Association is the biggie for finding groups. Kieretsu groups are pretty common on the West Coast and have a pretty good network of clubs.
Good luck with this project, don't give up too much equity and be sure to look for industry gurus even if you don't get funded.