Slightly off topic, but when I worked for a wire mfg'r, I got a call from a lady who had a copyright on some wiring technique she had come up with and she was trying to sell it to mfg'rs. I gave her to our head of engineering. I stopped him later and asked him about it. He said "It can't work. It won't pass UL inspection." I was confused and said, "But she got a copyright on it?" He said, "You can get a copyright on about anything.....they just check to see if anyone else filed the idea. That doesn't mean the idea is a good one .... if anyone made wire using her idea, the building would catch fire!"
(Melvira, I know you're just kidding around), but just some more FYI ...... I was involved in a trademark issue while with a casket mfg'r. During the process I learned that 'common' words cannot be trademarked. For example, a casket mfg'd cannot trademark "casket" or "coffin" because it is such a commonly used word that it would be prohibitive to others in the industry. THis prohibits anyone from doing a word-search and deciding "Hey! No one "owns" the phrase "wedding cake" so I'll trademark it and then no one else can advertise for wedding cakes!" It's such a common phrase that it cannot be trademarked.
I did know a lady who owned a restaurant, who claimed to have trademarked or copyrighted a sandwich that she created/sold. I was thinking at the time "how do you stop some guy in New York from thinking of the same sandwich without knowing anything about yours?"
But I guess that's why we have lots of lawyers, huh?!