This film has been copyrighted everywhere in the world except in the US, where it fell into the public domain from 1985-2000. Afterward, the rights were renewed in 2001 by Screen Media Ventures.
WARNING: There are a large number of pirated, supposedly public domain 'budget' releases of this film, released in the US after 2001, such as by Brentwood, Digicom TV, Direct Source, Dollar DVD, Osiris, Reel Vault, and others, with poor and/or cropped transfers.
This should be changed to:
Contrary to the view that it is public domain, this film is, and always has been, copyrighted.
WARNING: There are a large number of unauthorized, pirate DVD releases of this film. These include DVDs by ACME-TV (US), Artiflix (US), Beyond Classics (Australia), Brentwood Home Entertainment (US), Digicom TV (US), Digiview (US), Direct Source (US), Dollar DVD (US), Eastwest DVD (US), Echo Bridge Home Entertainment (US), Force Video (Australia), Oracle Home Entertainment (UK), Osiris Home Entertainment (US), Platinum Disc Corporation (US), RadioZET (Poland), Reel Vault (US), Treasure Box Collection (US), Westlake Entertainment Group (US), and others. Avoid them all, as they are barebones, and have poor and/or cropped transfers.
...as the film has never been public domain anywhere.