Research by Subject: Copyright: Permission

Permission

Copyright Clearance Center
Creative Commons "Share, Remix, Reuse — Legally Creative Commons is a nonprofit organization that increases sharing and improves collaboration."

The Copyright Card Catalog and the Online Files of the Copyright Office
Copyright Term and the Public Domain in the United States Concise chart to help determine if a work is in the public domain. Maintained by Copyright Information Center, Cornell University.
How to Investigate the Copyright Status of a Work Explains the terms of copyrights, differences in copyright protection granted before and after 1989 and suggests strategies for determining copyright status.
Is it protected by copyright? Use the interactive slider to determine if your property is in the public domain.