true, they are related in that they are all components of intellectual property law. but, there are huge differences in the scope of protection they offer, and for whom.

one key difference that is pertinent to this discussion is that copyright law includes a concept of "fair use". now, that concept has been distorted and limited by other legislation, but it is there. no such provision exists for patent law. if you violate a patent, knowingly or not, for commercial gain or not, you are liable for damages.

--dan.