Copyright status of The Wizard of Oz and related works in the United States
"The Wonderful Wizard of Oz" was published in 1900, and was the first to enter the public domain in "1956". This allowed Reilly & Lee, the publisher of all the other Oz books (as well as Baum's other books) to issue their own edition of "The Wizard of Oz", which had previously been published by George M. Hill Company and later by the Bobbs Merill Company after Hill went bankrupt..
The Magic Cloak of Oz
"The Magic Cloak of Oz" had distribution problems, owing to the box office failure of "The Patchwork Girl of Oz". Advertisements claimed that the film would be released September 28, 1914, by Paramount Pictures, but this apparently never occurred, though it was apparently released in its entirety in 1917. It was eventually reduced from a five-reel film to two two-reel films known as "The Magic Cloak" and "The Witch Queen". The current prints are assembled from these two films, and so the film is incomplete. All of its titles are missing, and "The Magic Cloak" title card, which is not in The Oz Film Manufacturing Company style, is used without any additional credits. Its only allusion to Oz is a title card's claim that the fairies of Burzee are "fairies of Oz".