The Public Domain

The public domain knowledge, information and works are no longer protected by copyright law. For example U.S. Government works are in the public domain, but not the works created by state governments. Facts also don’t fall under copyright law. They are in the public domain. (Carrie Russell, 2004)

The Public Domain Chart - Works Published in the U.S.

For the detailed table, see: http://www.copyright.cornell.edu/public_domain/ .