I would doubt that they would in fact be public domain. In order for them to be public domain the copyrights would have to have expired. In the United States (I am assuming that these shows were created by an American) copyrights expire 70 years after the death of the last remaining creator.
I really have no idea who created these radio shows or when he/she/they died, but I am willing to bet that it is less than 70 years ago.
Of course, there could be other circumstances which have led to the copyrights being ceded by the estate of the original holders, but you would think that the website that is claiming public domain would explain these circumstances, as they would be unusual.
Last edited by vanisleflamesfan; 11-15-2010 at 01:06 AM.
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