Unless you can burn hydrogen or other green fuel I can get paid to include my signature. If the world ran on my engine I doubt the world would be cruel and I not get paid. Don't be too sure about that, given the opportunity you will get screwed over and then screwed over again, with any invention you must first find out if anything else similar has an existing patent, and if it has what are the similarities and do they differ enough the have a your design patented seperately, also the cost of patents has increased dramatically over the last few years, and don't count on posting your designs to yourself and keeping in sealed envelope any kind of protection this is a myth that won't stand up in court, good luck but i think you have fekked up big time by showing your idea before taking the necessary safeguards to protect your designs