Copyright
The copyright for this story has expired in the United States and, thus, now resides in the public domain there. The text is available via Project Gutenberg. In anticipation of the 2012 Disney film John Carter, Edgar Rice Burroughs, Inc. has trademarked the phrases "John Carter of Mars," "Princess of Mars," and "Barsoom," among others, despite the Dastar decision of the United States Supreme Court, which invalidates trademark on public domain works.
Read more about this topic: A Princess Of Mars