From Stanford University. Includes primary materials such as copyright-related statutes, judicial opinions, regulations, and current copyright legislation and treaties. Also provides links to other copyright sites.
Allows you to determine, step-by-step, if an item is in the public domain. From the law firm Bromberg & Sunstein.
Easy to use web application that tells you if an item needs copyright permission and if it is in the public domain.
From the Cornell Copyright Information Center, this page provides a reference chart noting terms of copyright by date of work.
A discussion on copyright, particularly in the context of distance learning, from the University of Texas.
This webpage gives reasons for and resources for finding copyright holders of materials created in the United States.
Containing basic copyright information, the full text of US copyright laws, and downloadable forms pertaining to copyright application and registration, the Copyright Office site also includes a database which holds records of U. S. copyrights filed from January 1978 to the present.