I've mentioned it in the past.
Write down your idea; explaining the how, what, where, when, and whos of it's purpose. Seal it in an envelope, and send it "Certified Mail" to yourself. Do Not Open it.
That's your ticket and ownership of your idea. It's one way of protecting your idea before anyone else can get their greedy hands on it. You'll have to trust the sytem though. Send your originals in that package. You and I both know how far forensics have come.
If you get up the "gumpshin" to do it on your own, and some ass tries to horn in on your pie, you'll have proof who came up with it first when it gets to the court's level.
And, what ever you do, research first.
Click Here