Inside Google Book Search: U.S. copyright renewal records available for download

Inside Google Book Search For U.S. books published between 1923 and 1963, the rights holder needed to submit a form to the U.S. Copyright Office renewing the copyright 28 years after publication. In most cases, books that were never renewed are now in the public domain. Estimates of how many books were renewed vary, but everyone agrees that most books weren’t renewed. If true, that means that the majority of…