KitchenAid dishwasher KUDM 220t1
This dishwasher was designed by Hobart, but whirlpool had taken over completely by the time the 22s came out and had made several good improvements to it, but it certainly is a Hobart design if that's what you're looking for..
The 21 and 22 series dishwashers had good performance and good loading flexibility, other dishwashers had surpassed their performance by this time, Maytag whirlpool and the top-of-the-line GE's all actually cleaned better, but the KitchenAid was no slouch and if you're not looking for the maximum Cleaning ability, you may be quite happy with the KitchenAid one of the big failings of this KitchenAid series from the 21 on is it only had one final rinse.
The good thing about this dishwasher is it had better build quality than anybody else and there are more parts around for them than any of the other three that I just mentioned at this time so if the dishwasher is in good shape, you may be able to use it for many years.
John