When the 1966 film The Man Called Flintstone was originally released, it was distributed by Columbia Pictures.
As a nice little wink to the audience, Wilma filled in for the Columbia Torch Lady during the film's original release.
Hanna Barbera has changed hands several times over the years, finding a permanent home with Warner Brothers. Sadly, this ingenious title card is typically removed from the beginning of the film when it is shown these days.