From the Samuelson Clinic’s News Page:
The Samuelson Clinic is excited to provide a handbook, “Is it in the Public Domain?,” and accompanying visuals. These educational tools help users to evaluate the copyright status of a work created in the United States between January 1, 1923 and December 31, 1977—those works that were created before today’s 1976 Copyright Act. Many important works—from archival materials to family photos and movies—were created during this time, and it can be difficult to tell whether they are still under copyright.
The handbook walks readers though a series of questions—illustrated by accompanying charts—to help readers explore whether a copyrighted work from that time is in the public domain, and therefore free to be used without permission from a copyright owner. Knowing whether a work is in the public domain or protected by copyright is an important first step in any decision regarding whether or how to make use of a work.
Many thanks to eBook Friendly for alerting us to this new and useful reference resource.