are like coca-cola you have a trade secret that you don't want to write down for people to steal yoju wt kp cot thomases english muffins none of this is legally registered anywhere. >> that's right, the reason they don't register it is because patents and copyrights only work for a limited time. but when you keep something a trade secret, you can keep it a trade secret for 100 years and coca-cola has done that. some people allegedly did steal the secret. pepsi went to the fbi and told coca-cola? >> yes, these people got punished. i don't know if they realize that going into it, but stealing a trade secret is not just a faction but a federal crime and so they got in real trouble for doing that. john: penn and teller registered an act with the u.s. copyright office 30 years ago recently somebody in belgium posted a video of the trick that he called the rows of her shadow. i'm not sure if he grabbed it from the copyright office but he offered to reveal the secret behind it for $3000. teller sued him and laster he won $15000. so that is a reason to copyright. >> yes, except for right now teller mi