From Internet Archive Blogs:
The Internet Archive is now leveraging a little known, and perhaps never used, provision of US copyright law, Section 108h, which allows libraries to scan and make available materials published 1923 to 1941 if they are not being actively sold. Elizabeth Townsend Gard, a copyright scholar at Tulane University calls this “Library Public Domain.” She and her students helped bring the first scanned books of this era available online in a collection named for the author of the bill making this necessary: The Sonny Bono Memorial Collection. Thousands more books will be added in the near future as we automate. We hope this will encourage libraries that have been reticent to scan beyond 1923 to start mass scanning their books and other works, at least up to 1942.
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If the Founding Fathers had their way, almost all works from the 20th century would be public domain by now (14-year copyright term, renewable once if you took extra actions).
Some corporations saw adding works to the public domain to be a problem, and when Sonny Bono got elected to the House of Representatives, representing Riverside County, near Los Angeles, he helped push through a law extending copyright’s duration another 20 years to keep things locked-up back to 1923. This has been called the Mickey Mouse Protection Act due to one of the motivators behind the law, but it was also a result of Europe extending copyright terms an additional twenty years first. If not for this law, works from 1923 and beyond would have been in the public domain decades ago.
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But there is an exemption from this extension of copyright, but only for libraries and only for works that are not actively for sale — we can scan them and make them available. Professor Townsend Gard had two legal interns work with the Internet Archive last summer to find how we can automate finding appropriate scanned books that could be liberated, and hand-vetted the first books for the collection. Professor Townsend Gard has just released an in-depth paper giving libraries guidance as to how to implement Section 108(h) based on her work with the Archive and other libraries. Together, we have called them “Last Twenty” Collections, as libraries and archives can copy and distribute to the general public qualified works in the last twenty years of their copyright.
Link to the rest at Internet Archive Blogs and thanks to Dave for the tip.