As far as I know, anything written or produced by an individual is copyrighted in the United States regardless. The officialness of all of that would be Trademarks and Patents and those must be taken care of through official means. Having said that, I agree that it would be difficult to prove anything along those lines, Im really not sure what to tell you about how to protect everything.
CleaKO
"I think you'll be okay here, they have a thin candy shell. 'Surprised you didn't know that." - Tommy Boy
"Fill it up again! Fill it up again! Once it hits your lips, it's so good!" - Frank the Tank (Old School)