Public Domain Slide Rule
As a follow up to my last post about Orphan Works, questions have been asked as to what is or isn’t covered by copyright, and for how long.
Michael Brewer in conjunction with the ALA, developed a slide rule style tool, available at http://librarycopyright.net/digitalslider/ that should help with a lot of these questions. Of course, if you are a fan of the old slide rule technologies, you can also get a paper version of this tool. You may purchase it from the ALA at http://www.wo.ala.org/districtdispatch/?p=421.
