Sorry xzotic, I can't seem to get PM's. Not sure why, will look into the reason.
Thought this website might help, it gives all the info about copyright:
http://www.copyright.gov/circs/circ1.html#wci
fresnojohns: Harley Davidson is a trademark rather than a copyright, if you are using this in the course of trade on the same items or items similar to those for which it has been registered then you are infringing trademark, and they are likely to be a lot tougher with this than with copyright.
Infringing Copyright, means copying literary works; musical works, including any accompanying words; dramatic works, including any accompanying music; pantomimes and choreographic works;
pictorial, graphic, and sculptural works; motion pictures and other audiovisual works; sound recordings, and architectural works. Even if you copy only a small part of any of these, it is infringement, you do not need to copy the whole thing. If you were to copy part of a painting which had already been copied, then you are likely to infringe more than one copyright. (when it comes to books, you are generally allowed to copy a very small portion of the book for private use, without infringing copyright).
A trademark on the other hand, is a registered monopoly right. It is a logo, words, sign which suggest a make... much like the Nike swish - This is something we all know is a sign on Nike. Or the Apple Macs apple, or Coca Cola etc.