Max Fleischer made Superman fly—literally. Before his Superman cartoons, Superman was limited to running faster than a speeding locomotive and leaping tall buildings with a single bound. But animating a jumping character requires a lot of drawings, so Fleischer chose to make him fly, and the comic books imitated him.
After the cartoon rights reverted, DC Comics failed to renew the copyright. The Fleischer cartoons are now in the public domain, which is why many companies sell them on VHS and DVD.
But Superman’s trademarks are still owned by DC Comics. If you try to use the Fleischer Superman commercially, DC’s lawyers will use trademark law to come after you.
And the only person who can defeat a superhero is a lawyer.
The Superman suit for Poser and DAZ's Michael 4: Uzilite Super Hero.
My Fleischer variation at ShareCG: Superman - Fleischer - for free Uzilite M4 Suit. And at Renderosity: Superman - Fleischer - for free Uzilite M4 Suit.
Credit for the Max Fleischer Superman logo that I used: MachSabre on DeviantArt.
TRADEMARK INFRINGEMENT versus PUBLIC DOMAIN
Superman, Superdad, and the Limits of a Trademark Parody Defense | TheTMCA.com