[Playbahnosh]

Patents in software industry is a joke.
First, you cannot patent something that can be changes so easily. If you change on or two lines of code, you are out of business. Of couse you can patent to similarities as well, or every single bit of your program, but that just as good as nothing.
Second, pirates and others like them don't care about patents. They just steal the code and use it as they like. I've seen a couple of pirate utilities that looked and worked just like some real applications.
Copyright is another thing. It is for defending your own work, so nobody could claim is as theirs. It is an "Intellectual product" that you created, and you own it. When you purchase a software, you buy the licence to USE that product, but it's not yours.