Quick-

There was a discussion like this on a fishing form awhile back and one guy gave the easiest and cheapest way to prove that you had the original idea andprove itin acourt of law. He said to write out your idea, give a detail description made so sketches and if possibletakepictures of a prototype. Then seal in all in a vanilla envelope and have it mailed to yourself as a certified document through the Post Office and then never, never, neveropen it until you need to prove that you had the original idea for a product, invention or whatever and are in the presents of a judge in a courtroom. My only thought is to create more than one of these packets encase for some reason you need to prove it in more than one court case. The mind can create amazing things in a treestand with nature all around. Good luck on your idea!