Sometimes the subject of ©Copyrights on crochet patterns comes up. I think this site about Copyrights is a good page to read about this subject. It is to the  point without all the legal mumbo jumbo, and makes the law about ©Copyrights and Public Domain Patterns easy to understand. http://crochet.about.com/library/blcopyrightguide.htm by Sandi Marshall. Sandi does not intend this to be legal advice, and suggest if you need legal advice to contact a good Copyright Lawyer.

This is another good web site about ©Copyrights. This FAQ (Frequently Asked Questions) page is from, The Girl From Auntie.

U.S. Copyright Office: http://www.copyright.gov/ Lots of helpful information and FAQ's.

UK Copyright Service: http://www.copyrightservice.co.uk/

Australian Copyright: http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/index.html

Canadian: http://cipo.gc.ca/

THE POOR MAN'S COPYRIGHT ©: The Poor Man's Copyright ©

This is a great page for information about Copyright and the Internet.  It also explains a bit about the Copyright © and  much more. It also has a lot of helpful information, about images and web pages etc. http://whatiscopyright.org/