As you probably know, there were 17 exquisite, magnificently designed Superman cartoons produced between 1941 and 1943. The first half-dozen were produced by the Max Fleischer Studio, which released its wares through Paramount. Then the lovely people at Paramount foreclosed on Fleischer, took over his operation and renamed it Famous Studios. The quality remained generally high but the series soon expired.
Because they somehow lapsed into public domain, these shorts are widely available, often on cheapo videotapes of bad quality, but there are some good copies around on tape, Laserdisc and DVD. And if you don't mind viewing them in a teensy frame, you can watch them on your computer screen (and even download them to view at your leisure) by going to this site. And if you like Superman, browse around that website. It's full of nifty Superman info.