Copyright lapsed on this film and was not renewed by the holder, so it went into public domain, meaning that anyone can make and sell copies of it.
One scene takes place in from of a theatre where posters for The Vampire Bat are on display. "The Vampire Bat" was one of Majestic's biggest hits, and remains the most widely seen of its existing films. It had gone into release about three months before the release of this film.