Public Domain Slider
The Public Domain slider is a tool to help determine the copyright status of a work that is first published in the United States. Most of us know that any work published before 1923 is in the public domain, but the copyright status for copyrighted works after 1923 can be difficult to determine because of varying copyright registration requirements over the years and because the term of copyright has changed a number of times. The good news is that there are many works in the public domain that have been published after 1923 because registration was not renewed and/or the copyright symbol – © – does not appear on the work. If a work is in the public domain, you are free to use that work in any way that you choose – digitize it, re-publish it, post it on the web etc. – of course with appropriate attribution.