Westinghouse Laundromat's
EuGene, lest we not forget the Tappan Fabulous 400, also making an appearance in "The Parent Trap." I didn't mention these as they weren't being used in the movie. But it and the dishwasher are, indeed, beautiful pieces of equipment (as is Maureen O'Hara, as well.)
Oddly, Mitch also has a built-it cook top in addition to the Tappan range. Maggie (Maureen O'Hara) is making Irish Stew, for Mitch (Brian Keith) on it.
I doubt if there are any sci fi buffs on this site so you may not have seen the classic "B" science fiction film. "The Magnetic Monster," starring Richard Carlson and Jean Byron (Patty Duke's TV mom.)
It also stars a whole row of brand new 1952/53 model Westinghouse Laundromats.
A scientist, in his laboratory located on the second floor over a hardware store, magnetizes the entire store below and the doors of the Westinghouse machines keep opening and closing on their own. You can also see many small appliances, of the day, (percolators, skillets) in the hardware store.
(BTW, Despite the silly title, this is a very well done film. You won't leave your chair in the last 15 minutes!)