Orphaned
Works Database (Stanford University's Copyright Renewal Database)
This database makes searchable the copyright renewal records
received by the US Copyright Office between 1950 and 1993 for
books published in the US between 1923 and 1963. Note that the
database includes ONLY US Class A (book) renewals.
Copyright Toolbox
Part of the Copyright
Resources Project from the University of California at Berkeley.
This is a helpful resource for people working with copyright-protected
materials.